NanPan 36b124c7fc
fix(persistence): drain alembic workers across cancellation (#5631)
* fix(persistence): drain alembic workers across cancellation

* docs(persistence): clarify alembic cancellation ownership

* docs(persistence): align alembic helper ownership contract

* fix(persistence): restore docstring underline
2026-09-22 22:17:11 +08:00
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