sankey-beta
 %% Flux du Budget Total vers les Régions
 Total Cloud Budget,AWS US-East-1 (Virginia),5000
 Total Cloud Budget,AWS EU-West-3 (Paris),3500
 Total Cloud Budget,GCP Global (Data Lake),1500
 %% Répartition Virginia (Le gros du trafic)
 AWS US-East-1 (Virginia),EC2 Compute Nodes,2500
 AWS US-East-1 (Virginia),RDS Database Cluster,1500
 AWS US-East-1 (Virginia),S3 Storage,1000
 %% Répartition Paris (Compliance & Edge)
 AWS EU-West-3 (Paris),EC2 Compute Nodes,1500
 AWS EU-West-3 (Paris),Lambda Edge,1000
 AWS EU-West-3 (Paris),CloudFront CDN,1000
 %% Le Data Lake (GCP)
 GCP Global (Data Lake),BigQuery Analysis,1200
 GCP Global (Data Lake),Cloud Storage,300
 %% Destination Finale : Valeur Métier vs Gaspillage
 EC2 Compute Nodes,Production Traffic,3200
 EC2 Compute Nodes,Idle Resources (Waste),800
 RDS Database Cluster,Active Queries,1200
 RDS Database Cluster,Backup & Snapshots,300
 Lambda Edge,API Gateway,800
 Lambda Edge,Log Processing,200
 BigQuery Analysis,Business Intelligence,1000
 BigQuery Analysis,Useless Scans (Waste),200
 CloudFront CDN,User Content Delivery,950
 CloudFront CDN,DDoS Protection Overhead,50

flowchart TD
 %% Custom Styles for visual impact
 classDef edge fill:#111827,stroke:#3b82f6,stroke-width:2px,color:#fff
 classDef gateway fill:#065f46,stroke:#34d399,color:#fff
 classDef mesh fill:#1e3a8a,stroke:#60a5fa,color:#fff
 classDef service fill:#312e81,stroke:#818cf8,color:#fff
 classDef data fill:#78350f,stroke:#fbbf24,color:#fff
 classDef ai fill:#4c1d95,stroke:#a78bfa,color:#fff
 classDef sec fill:#7f1d1d,stroke:#f87171,color:#fff
 classDef obs fill:#0f766e,stroke:#2dd4bf,color:#fff
 classDef devops fill:#831843,stroke:#f472b6,color:#fff
 %% 1. GLOBAL INGRESS & EDGE NETWORK
 subgraph GLOBAL_EDGE [1. Global Edge & Ingress Network]
 direction LR
 WEB(Web Clients)
 MOB(Mobile Apps)
 IOT(IoT Fleet 1M+ Devices)
 B2B(B2B API Partners)
 CDN[Global CDN Anycast]:::edge
 DDOS[L3/L4 DDoS Mitigation]:::sec
 WAF[L7 Web App Firewall / Bot Mgmt]:::sec
 ZTA[Zero Trust Network Access]:::sec
 WEB & MOB & IOT & B2B --> CDN --> DDOS --> WAF
 CORP_USERS(Corporate VPN) --> ZTA
 end
 %% 2. CORPORATE IDENTITY & SECURITY
 subgraph IAM_SECOPS [2. Identity & Security Operations]
 direction TB
 OKTA[Global IDP / SSO / MFA]:::sec
 SIEM[Splunk SIEM / Threat Intel]:::sec
 VAULT[HashiCorp Vault Enterprise Cluster]:::sec
 ZTA --> OKTA
 WAF -.->|Security Events| SIEM
 end
 %% 3. MULTI-REGION CLOUD PLATFORM
 subgraph MULTI_CLOUD [3. Multi-Region Hybrid Cloud Infrastructure]
 direction TB
 GTM[Global Traffic Manager / Geo-DNS]:::gateway
 WAF --> GTM
 %% REGION A - PRIMARY
 subgraph REGION_A [Region A: Primary Data Center]
 direction TB
 API_A[API Gateway / Rate Limiting]:::gateway
 GTM --> API_A
 subgraph K8S_A [Kubernetes Cluster A - Service Mesh]
 direction TB
 MESH_A{Istio Control Plane + mTLS}:::mesh
 subgraph DOMAINS [Domain Driven Microservices]
 direction LR
 SVC_USR[User & Auth Domain]:::service
 SVC_FIN[Financial Ledger Core]:::service
 SVC_LOG[Logistics & Routing]:::service
 SVC_IOT[IoT Telemetry Ingestion]:::service
 end
 API_A --> MESH_A
 MESH_A --> SVC_USR & SVC_FIN & SVC_LOG & SVC_IOT
 end
 subgraph EVENT_BUS [Event Driven Backbone]
 direction LR
 KAFKA_A[Kafka Cluster + Schema Registry]:::data
 PULSAR[Apache Pulsar / UDP Streams]:::data
 end
 subgraph DATA_A [Distributed Data Persistence]
 direction LR
 CRDB_A[(CockroachDB Distributed SQL)]:::data
 CASS_A[(Cassandra Wide-Column)]:::data
 REDIS_A[(Redis Enterprise Cluster)]:::data
 end
 SVC_FIN --> KAFKA_A
 SVC_IOT --> PULSAR
 SVC_USR --> CRDB_A
 SVC_LOG --> CASS_A
 SVC_FIN --> REDIS_A
 end
 %% REGION B - DISASTER RECOVERY
 subgraph REGION_B [Region B: Active-Active Replica]
 direction TB
 API_B[API Gateway B]:::gateway
 GTM --> API_B
 K8S_B[Kubernetes Cluster B]:::service
 CRDB_B[(CockroachDB Replica)]:::data
 API_B --> K8S_B
 CRDB_A -.->|Synchronous Geo-Replication| CRDB_B
 KAFKA_A -.->|MirrorMaker 2.0| K8S_B
 end
 end
 %% 4. BIG DATA & AI/ML PIPELINE
 subgraph AI_LAKE [4. Big Data Lakehouse & MLOps Platform]
 direction TB
 SPARK[Apache Spark Streaming / ETL]:::ai
 HADOOP[(S3 Data Lake / Parquet)]:::ai
 AIRFLOW[Apache Airflow Orchestration]:::ai
 subgraph ML_OPS [Machine Learning Operations]
 direction LR
 TRAIN[TensorFlow Distributed Training]:::ai
 FEAT[Feast Feature Store]:::ai
 SERVE[Nvidia Triton Inference Server]:::ai
 end
 PULSAR --> SPARK
 KAFKA_A --> SPARK
 SPARK --> HADOOP
 HADOOP --> TRAIN
 TRAIN --> FEAT --> SERVE
 SERVE -.->|gRPC Predictions| SVC_LOG
 AIRFLOW -.->|Schedules| SPARK & TRAIN
 end
 %% 5. DEVOPS & CI/CD PIPELINE
 subgraph DEVOPS [5. Enterprise Platform Engineering]
 direction LR
 GIT[GitHub Enterprise]:::devops
 SONAR[SonarQube SAST/DAST]:::devops
 REG[Harbor Image Registry]:::devops
 ARGO[ArgoCD GitOps Synchronizer]:::devops
 GIT --> SONAR --> REG --> ARGO
 end
 %% 6. GLOBAL OBSERVABILITY
 subgraph OBS_PLATFORM [6. Global Telemetry & Observability]
 direction LR
 PROM[Prometheus Fleet]:::obs
 JAEG[Jaeger Distributed Tracing]:::obs
 ELAS[Elasticsearch / Logstash]:::obs
 GRAF[Grafana Command Center]:::obs
 PROM & JAEG & ELAS --> GRAF
 end
 %% CROSS-CUTTING LINKS
 REGION_A -.->|Logs/Traces/Metrics| OBS_PLATFORM
 ARGO ==>|Automated Deploys| K8S_A & K8S_B
 REGION_A -.->|Fetch Secrets| VAULT
 REGION_A -.->|OIDC Auth Requests| OKTA

erDiagram
 %% CORE TENANT MANAGEMENT
 TENANT ||--o{ WORKSPACE : "contains"
 TENANT ||--o{ DOMAIN_MAPPING : "owns"
 TENANT ||--|| TENANT_BILLING_PROFILE : "has"
 %% IDENTITY AND ACCESS MANAGEMENT (IAM)
 TENANT ||--o{ USER : "manages"
 USER ||--o{ USER_SESSION : "establishes"
 USER ||--o{ OAUTH_IDENTITY : "links"
 WORKSPACE ||--o{ WORKSPACE_MEMBER : "includes"
 USER ||--o{ WORKSPACE_MEMBER : "acts as"
 WORKSPACE_MEMBER ||--o{ MEMBER_ROLE : "assigned"
 ROLE ||--o{ MEMBER_ROLE : "defines"
 ROLE ||--o{ ROLE_PERMISSION : "contains"
 PERMISSION ||--o{ ROLE_PERMISSION : "grants"
 %% BILLING AND SUBSCRIPTION
 TENANT_BILLING_PROFILE ||--o{ SUBSCRIPTION : "holds"
 SUBSCRIPTION_PLAN ||--o{ SUBSCRIPTION : "based on"
 SUBSCRIPTION ||--o{ INVOICE : "generates"
 INVOICE ||--o{ INVOICE_LINE_ITEM : "contains"
 INVOICE ||--o{ PAYMENT_TRANSACTION : "paid via"
 SUBSCRIPTION ||--o{ USAGE_RECORD : "tracks metered"
 %% INTEGRATION AND API
 TENANT ||--o{ API_KEY : "generates"
 TENANT ||--o{ WEBHOOK_ENDPOINT : "configures"
 WEBHOOK_ENDPOINT ||--o{ WEBHOOK_DELIVERY : "logs"
 API_KEY ||--o{ API_REQUEST_LOG : "authenticates"
 %% SECURITY AND AUDIT
 USER ||--o{ AUDIT_LOG : "triggers"
 TENANT ||--o{ GDPR_CONSENT_RECORD : "maintains"
 %% BUSINESS DOMAIN (QMS & ERP)
 WORKSPACE ||--o{ EMPLOYEE : "employs"
 EMPLOYEE ||--o{ SHIFT_SCHEDULE : "assigned to"
 WORKSPACE ||--o{ QUEUE : "operates"
 QUEUE ||--o{ TICKET : "processes"
 TICKET ||--o{ TICKET_EVENT : "records"
 TENANT {
 uuid id PK
 varchar organization_name
 varchar compliance_region
 jsonb feature_flags
 boolean is_active
 timestamptz created_at
 }
 USER {
 uuid id PK
 uuid tenant_id FK
 varchar email
 varchar password_hash
 boolean mfa_enabled
 timestamptz last_login
 }
 WORKSPACE_MEMBER {
 uuid id PK
 uuid workspace_id FK
 uuid user_id FK
 enum status
 }
 ROLE {
 uuid id PK
 uuid tenant_id FK
 varchar name
 boolean is_system_default
 }
 SUBSCRIPTION {
 uuid id PK
 uuid billing_profile_id FK
 uuid plan_id FK
 enum status
 timestamptz current_period_end
 boolean cancel_at_period_end
 }
 INVOICE {
 uuid id PK
 uuid subscription_id FK
 decimal subtotal
 decimal tax_amount
 decimal total
 enum currency
 enum payment_status
 timestamptz due_date
 }
 PAYMENT_TRANSACTION {
 uuid id PK
 uuid invoice_id FK
 varchar payment_gateway_id
 decimal amount_settled
 varchar receipt_url
 timestamptz processed_at
 }
 AUDIT_LOG {
 bigserial id PK
 uuid tenant_id FK
 uuid user_id FK
 varchar resource_type
 uuid resource_id
 varchar action
 jsonb previous_state
 jsonb new_state
 inet source_ip
 timestamptz created_at
 }
 WEBHOOK_DELIVERY {
 bigserial id PK
 uuid endpoint_id FK
 varchar event_type
 jsonb payload
 smallint http_status_code
 integer processing_time_ms
 boolean success
 }
 TICKET {
 uuid id PK
 uuid queue_id FK
 uuid assigned_employee_id FK
 enum priority
 enum status
 timestamptz resolved_at
 }

sequenceDiagram
 autonumber
 actor Client as Android Client
 box rgba(35, 134, 54, 0.1) Edge & Ingress Layer
 participant WAF as L7 WAF & Anti-DDoS
 participant GW as API Gateway (Kong/Envoy)
 end
 box rgba(43, 92, 143, 0.1) Security & Caching
 participant IDP as OAuth2/OIDC Provider
 participant Redis as Redis Cluster
 end
 box rgba(107, 66, 120, 0.1) Core Application Logic
 participant Svc as Core Domain Service (Laravel/Node)
 participant PGB as PgBouncer (Pooler)
 participant DB as PostgreSQL (Primary)
 end
 box rgba(215, 58, 73, 0.1) Event-Driven Backbone
 participant CDC as Debezium (WAL Tailer)
 participant Kafka as Apache Kafka
 participant DLQ as RabbitMQ (Dead Letter)
 end
 box rgba(176, 107, 26, 0.1) Downstream Consumers
 participant BillSvc as Billing Microservice
 participant NotifSvc as Notification Worker
 end
 %% Client Request Phase
 Client->>WAF: POST /api/v4/transactions (Payload, Idempotency-Key)
 WAF->>WAF: Deep Packet Inspection & Bot Mitigation
 WAF->>GW: Forward Request (TLS Terminated)
 %% Authentication & Throttling Phase
 GW->>Redis: GET token_blacklist:{jwt_jti}
 Redis-->>GW: Null (Token Valid)
 GW->>IDP: Validate JWT Signature (JWKS Cache)
 IDP-->>GW: Claims & Scopes Extracted
 GW->>Redis: EVAL (Token Bucket Rate Limit Lua Script)
 Redis-->>GW: Remaining Quota: 499
 %% Idempotency Check
 GW->>Svc: Route via gRPC / HTTPS + Headers
 Svc->>Redis: SETNX idempotency:{key} "PROCESSING" EX 300
 alt Key already exists
 Redis-->>Svc: 0 (Already processing/Done)
 Svc-->>GW: 409 Conflict / 200 OK (Cached Response)
 else Key is new
 Redis-->>Svc: 1 (Lock acquired)
 %% Database Transaction (Optimistic Locking & Outbox Pattern)
 Svc->>PGB: Checkout Connection
 PGB->>DB: BEGIN TRANSACTION (ISOLATION LEVEL SERIALIZABLE)
 Svc->>DB: SELECT version FROM entities WHERE id = ? FOR SHARE
 DB-->>Svc: version = 4
 Svc->>Svc: Business Logic & Payload Validation
 Svc->>DB: UPDATE entities SET ..., version = 5 WHERE id = ? AND version = 4
 alt Optimistic Lock Failed (Row updated by another thread)
 DB-->>Svc: 0 rows affected
 Svc->>DB: ROLLBACK
 Svc->>Redis: DEL idempotency:{key}
 Svc-->>GW: 412 Precondition Failed (Retry required)
 else Optimistic Lock Succeeded
 DB-->>Svc: 1 row affected
 %% Transactional Outbox Insert
 Svc->>DB: INSERT INTO outbox (aggregate_id, event_type, payload)
 DB-->>Svc: Success
 Svc->>DB: COMMIT
 PGB-->>Svc: Release Connection
 Svc->>Redis: SET idempotency:{key} "COMPLETED"
 Svc-->>GW: 202 Accepted (Processing Asynchronously)
 GW-->>Client: HTTPS 202 (Includes Correlation-ID)
 end
 end
 %% Asynchronous Event Streaming (CDC)
 par Change Data Capture Processing
 DB-->>CDC: Write-Ahead Log (WAL) Stream Emits Insert
 CDC->>CDC: Transform logical decoding to JSON
 CDC->>Kafka: Publish to 'domain.events' (acks=all)
 Kafka-->>CDC: Offset Committed
 CDC->>DB: Mark Outbox Row as Processed (or Delete)
 end
 %% Downstream Fan-out
 par Event Consumption
 Kafka-)BillSvc: Consume Event (Consumer Group: billing)
 BillSvc->>BillSvc: Process Invoice
 Kafka-)NotifSvc: Consume Event (Consumer Group: notifications)
 NotifSvc->>NotifSvc: Attempt SMS Dispatch
 alt Dispatch Fails (Timeout/Error)
 NotifSvc->>NotifSvc: Exponential Backoff Retry (Max 3)
 NotifSvc->>DLQ: Route to Dead Letter Exchange
 DLQ-->>NotifSvc: Ack
 end
 end

gantt
 title Global Enterprise Transformation
 dateFormat YYYY-MM-DD
 axisFormat %Y-%m
 section 1. Strategy & Governance
 Enterprise Architecture Blueprint :done, s1, 2026年01月01日, 45d
 Vendor & Procurement Finalization :done, s2, after s1, 30d
 Global Threat Modeling :active, s3, after s1, 40d
 Architecture Board Sign-off :milestone, m1, after s3, 0d
 section 2. Cloud & Platform Eng.
 Multi-Region Landing Zone Setup :c1, after m1, 60d
 Global Kubernetes (EKS/GKE) :c2, after c1, 45d
 Istio Service Mesh Integration :c3, after c2, 30d
 Kafka Event-Driven Backbone :crit, c4, after c2, 60d
 Infrastructure Freeze :milestone, m2, after c4, 0d
 section 3. Security & Zero-Trust
 Global IDP & OIDC Integration :sec1, after m1, 50d
 Vault Secrets Management :sec2, after sec1, 40d
 Zero-Trust Network Access (ZTNA) :sec3, after sec2, 45d
 External Penetration Testing :crit, sec4, after m2, 30d
 Security & Compliance Sign-off :milestone, m3, after sec4, 0d
 section 4. Data & AI Ecosystem
 Legacy DB Migration Planning :d1, after m1, 60d
 Distributed SQL Implementation :d2, after m2, 90d
 Real-Time Stream Processing :d3, after d2, 60d
 MLOps Platform Provisioning :d4, after d2, 45d
 section 5. Core Microservices
 API Gateway & Rate Limiting :b1, after m2, 30d
 ERP Monolith Decoupling :crit, b2, after b1, 120d
 Financial Ledger Microservice :b3, after b2, 60d
 High-Volume Async Workers :b4, after b2, 45d
 section 6. Global QA & Chaos
 Automated E2E Testing Suite :q1, after b2, 60d
 Distributed Load Testing :q2, after q1, 30d
 Chaos Engineering & Faults :crit, q3, after q2, 30d
 UAT & Business Sign-off :milestone, m4, after q3, 0d
 section 7. Global Rollout
 EMEA Region Cutover :r1, after m4, 21d
 APAC Region Cutover :r2, after r1, 21d
 AMER Region Cutover :crit, r3, after r2, 21d
 Global Go-Live :milestone, m5, after r3, 0d
 Hypercare & L3 Transition :r4, after m5, 45d

xychart-beta
 title "Production Telemetry: Ingress Traffic vs Active K8s Pods"
 x-axis "Time (UTC) - 24H High-Traffic Event" [0h, 4h, 8h, 10h, 12h, 14h, 16h, 18h, 20h, 22h, 24h]
 y-axis "Volume (kRPS / Pod Count)" 0 --> 650
 bar [15, 12, 45, 120, 480, 550, 490, 620, 320, 150, 40]
 line [10, 10, 35, 100, 400, 460, 410, 520, 270, 120, 30]

classDiagram
direction TB
class AggregateBase {
 <<abstract>>
 id
 createdAt
 updatedAt
 version
 events
}
class DomainEvent {
 <<abstract>>
 occurredAt
}
class Money {
 amount
 currency
}
class Address {
 street
 city
 country
}
class TaxConfiguration {
 vatNumber
 taxExempt
}
class Tenant {
 <<AggregateRoot>>
 organizationId
 status
}
class TenantRepository
class Subscription {
 <<AggregateRoot>>
 tenantId
 status
 currentPeriodStart
 currentPeriodEnd
}
class Invoice {
 <<AggregateRoot>>
 tenantId
 status
 total
}
class InvoiceLineItem {
 description
 quantity
}
class InvoiceRepository
class SubscriptionRepository
class Payment {
 <<AggregateRoot>>
 invoiceId
 status
 amount
}
class Transaction {
 providerRef
 status
}
class PaymentRepository
class IPaymentGateway {
 <<interface>>
 authorize()
 capture()
 refund()
}
class TaxCalculationService
class InvoiceGeneratedEvent
class InvoicePaidEvent
class PaymentFailedEvent
class SubscriptionRenewedEvent
AggregateBase <|-- Tenant
AggregateBase <|-- Subscription
AggregateBase <|-- Invoice
AggregateBase <|-- Payment
DomainEvent <|-- InvoiceGeneratedEvent
DomainEvent <|-- InvoicePaidEvent
DomainEvent <|-- PaymentFailedEvent
DomainEvent <|-- SubscriptionRenewedEvent
Tenant *-- TaxConfiguration
TaxConfiguration *-- Address
Invoice *-- "1..*" InvoiceLineItem
Invoice *-- Money
InvoiceLineItem *-- Money
Payment *-- Transaction
Payment *-- Money
Tenant "1" --> "0..*" Subscription
Tenant "1" --> "0..*" Invoice
Subscription --> Tenant
Invoice --> Tenant
Invoice "1" --> "0..*" Payment
Payment --> Invoice
Invoice ..> TaxCalculationService
Invoice ..> InvoiceGeneratedEvent
Invoice ..> InvoicePaidEvent
Payment ..> PaymentFailedEvent
Subscription ..> SubscriptionRenewedEvent
Payment ..> IPaymentGateway
Transaction ..> IPaymentGateway
Subscription ..> Invoice
Tenant ..> Invoice
Tenant ..> Subscription
InvoiceLineItem ..> TaxCalculationService
Payment ..> InvoiceRepository
Subscription ..> SubscriptionRepository
TenantRepository --> Tenant
InvoiceRepository --> Invoice
SubscriptionRepository --> Subscription
PaymentRepository --> Payment
TenantRepository ..> Invoice
InvoiceRepository ..> Payment
SubscriptionRepository ..> Tenant
PaymentRepository ..> Invoice
Money ..> TaxConfiguration
Money ..> Payment
Money ..> Invoice
Address ..> Tenant
Address ..> Invoice
Transaction ..> Invoice
Transaction ..> Subscription
TaxCalculationService ..> Tenant
TaxCalculationService ..> Subscription
TaxCalculationService ..> Payment

stateDiagram-v2
direction TB
[*] --> API_Ingress
state "API Layer" as API_Layer {
 API_Ingress --> AuthN
 AuthN --> AuthZ
 AuthZ --> Idempotency_Check
 Idempotency_Check --> Request_Accepted
}
Request_Accepted --> Saga_Orchestrator
state "Saga Orchestrator" as Saga_Orchestrator_State {
 [*] --> Init_Saga
 Init_Saga --> Persist_Saga_State
 Persist_Saga_State --> Publish_Order_Created_Event
}
Saga_Orchestrator --> Event_Bus
state "Event Bus (Kafka)" as Event_Bus_State {
 Event_Bus --> Inventory_Service
 Event_Bus --> Payment_Service
 Event_Bus --> Risk_Service
}
state "Inventory Service" as Inventory_Service {
 [*] --> Consume_Order_Event
 Consume_Order_Event --> Check_Stock
 Check_Stock --> Reserve_Stock : Available
 Check_Stock --> Emit_Stock_Failed : Out_Of_Stock
 Reserve_Stock --> Persist_Outbox
 Persist_Outbox --> Publish_Stock_Reserved
}
Inventory_Service --> Event_Bus
state "Payment Service" as Payment_Service {
 [*] --> Consume_Order_Event_Payment
 Consume_Order_Event_Payment --> Create_Payment_Intent
 Create_Payment_Intent --> Call_PSP
 state "Resilience Layer" as Resilience {
 Call_PSP --> Payment_Success
 Call_PSP --> Transient_Error
 Transient_Error --> Retry_Backoff
 Retry_Backoff --> Call_PSP : retry < 3
 Transient_Error --> Emit_Payment_Failed : retry >= 3
 }
 Payment_Success --> Persist_Outbox_Payment
 Persist_Outbox_Payment --> Publish_Payment_Succeeded
}
Payment_Service --> Event_Bus
state "Risk Service" as Risk_Service {
 [*] --> Consume_Order_Event_Risk
 Consume_Order_Event_Risk --> AML_Check
 AML_Check --> Fraud_Scoring
 Fraud_Scoring --> Emit_Risk_Approved
 Fraud_Scoring --> Emit_Risk_Rejected
}
Risk_Service --> Event_Bus
Event_Bus --> Saga_Decision
state "Saga Decision Engine" as Saga_Decision {
 [*] --> Wait_All_Events
 Wait_All_Events --> Evaluate_Results
 Evaluate_Results --> Saga_Success : All_OK
 Evaluate_Results --> Saga_Failure : Any_Fail
}
Saga_Success --> Finalization
state "Finalization" as Finalization_State {
 [*] --> Update_Read_Model
 Update_Read_Model --> Emit_Completed_Event
 Emit_Completed_Event --> Notify_User_WS
}
Finalization_State --> [*]
Saga_Failure --> Compensation_Saga
state "Compensation Saga" as Compensation_Saga {
 [*] --> Emit_Compensation_Events
 Emit_Compensation_Events --> Refund_Payment
 Emit_Compensation_Events --> Release_Stock
 Refund_Payment --> Retry_Refund
 Retry_Refund --> Refund_Payment : retry < 3
 Retry_Refund --> Dead_Letter_Queue : retry >= 3
 Release_Stock --> Inventory_Compensated
}
Compensation_Saga --> [*]
Dead_Letter_Queue --> Alerting_System
Alerting_System --> Manual_Intervention
state "Outbox Pattern" as Outbox {
 Persist_Outbox --> CDC_Stream
 Persist_Outbox_Payment --> CDC_Stream
 CDC_Stream --> Event_Bus
}
state "Timeout & Watchdog" as Timeout {
 Saga_Orchestrator --> Start_Timer
 Start_Timer --> Timeout_Reached
 Timeout_Reached --> Saga_Failure
}

pie
 title "Engineering Time: Innovation vs Debt"
 "Innovation" : 32
 "Refactoring" : 18
 "Legacy Maintenance" : 15
 "Security & Compliance" : 13
 "QA & Automation" : 12
 "Architecture" : 10

kanban
 Strategic Backlog
 Global Infrastructure Scaling
 Zero Trust Security Migration
 Data Lakehouse Consolidation
 Legacy Monolith Decoupling
 FinOps Cost Optimization
 Multi Cloud Recovery Plan
 Architecture and Design
 gRPC Interface Definitions
 PostgreSQL Sharding Strategy
 Terraform Module Refactoring
 Event Schema Versioning
 K8s Mesh Topology Design
 Engineering In Progress
 Transactional Outbox Pattern
 Redis PubSub WebSocket Scale
 Tailwind JIT UI Migration
 Idempotency Key Middleware
 OAuth2 OIDC Core Integration
 Security and Review
 CVE Middleware Patch Audit
 SQL N1 Query Elimination
 RBAC Tenant Isolation Audit
 Dependency Vulnerability Scan
 Internal Penetration Test
 QA and Load Testing
 Chaos Mesh Network Partition
 100k RPS Ingress Benchmark
 End to End Payment Testing
 User Acceptance Final Signoff
 Deployment Pipeline
 Blue Green Rollout Logic
 Vault Secrets Rotation Setup
 Prometheus Alert Thresholds
 ArgoCD GitOps Sync Policy
 Production Status
 EMEA Region VPC Peering
 APAC Cluster Bootstrapping
 Global CDN Edge Purging
 SLA Monitoring Dashboards