Important

Add sleep statements in dataset_queries.rs tests for ClickHouse consistency and remove two stale datapoint tests.

• Behavior:
  • Add tokio::time::sleep for 1 second after write operations in dataset_queries.rs to ensure ClickHouse consistency.
  • Affects tests like test_count_datasets, test_count_datapoints_for_dataset_function_chat, and test_insert_datapoint_chat.
• Removals:
  • Remove test_stale_datapoint_chat and test_stale_datapoint_json functions from dataset_queries.rs.

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