Harden cleanup scheduler and audit cleanup deletions

karldns/app.py

@@ -104,7 +104,12 @@ def make_app(settings: DdnsSettings | None = None) -> FastAPI:
 async def _scheduler_loop(store: DdnsStore, settings: DdnsSettings) -> None:
     poll_seconds = min(settings.cleanup_interval_seconds, 60)
     while True:
-        await _run_cleanup_if_due(store, settings)
+        try:
+            await _run_cleanup_if_due(store, settings)
+        except asyncio.CancelledError:
+            raise
+        except Exception:
+            LOGGER.exception("Scheduled cleanup loop crashed; continuing")
         await asyncio.sleep(poll_seconds)