OTP supervision boundary for workers consuming one Absurd queue.

A pool validates its task catalog and the installed Absurd schema before it starts claiming. It owns an unnamed dynamic supervisor for temporary runners and one capacity-aware poller; the caller continues to own the Postgrex queryable.

Place the pool after that queryable in the host application's supervision tree:

children = [
  {Postgrex, name: MyApp.AbsurdDB, database: "my_app"},
  {Absurd.WorkerPool,
   name: MyApp.AbsurdWorkers,
   db: MyApp.AbsurdDB,
   queue: "default",
   tasks: [MyApp.SendEmail]}
]

Runner processes are temporary. PostgreSQL, rather than OTP restart policy, decides whether interrupted durable work is retried.