fix: Telegram-Polling-Task sauber canceln + WhatsApp CancelledError beim Shutdown unterdrücken

channels/whatsapp_channel.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import logging
 from typing import Any, Callable, Awaitable
 
@@ -98,6 +99,8 @@ class WhatsAppChannel(BaseChannel):
                 await self._process_notification(body)
                 if receipt_id:
                     await self._delete_notification(receipt_id)
+        except asyncio.CancelledError:
+            raise
         except Exception as exc:
             logger.error("WhatsApp poll error: %s", exc)