I'm using postgres.js and noticed your Drizzle example creates the db instance outside the task.

I'm wondering:

1. Task isolation: Do tasks run in separate workers/processes, or share the same Node process?

2. Connection lifecycle: If I create a postgres instance outside the task:

   const sql = postgres(process.env.DATABASE_URL!)
   export const myTask = task({
    id: "my-task",
    run: async (payload) => {
    return sql`SELECT * FROM users`
    }
   })

   Is this instance shared across all executions, or does each worker get its own?

3. Connection cleanup: postgres.js requires sql.end() to properly close connections. Should I handle this cleanup or does the worker lifecycle manage it?