Lukas 5d24780c63 TASK-028: Add exception logging to fire-and-forget asyncio.create_task() ...

- Create logged_task() helper in backend/app/utils/async_utils.py to wrap
  fire-and-forget coroutines with exception logging
- Ensures unhandled task exceptions are always logged to structlog instead of
  silently discarded (Python 3.11+ RuntimeWarning)
- Update ban_service.py to use logged_task() for geo_cache.lookup_batch()
  background resolution
- Add comprehensive tests for logged_task() in test_async_utils.py
- Document fire-and-forget task conventions in Backend-Development.md

The logged_task() wrapper catches any exception raised in a background task,
logs it with full traceback context and task name, and never re-raises.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-04-26 15:17:30 +02:00

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