fix: sauberer Shutdown (Telegram Updater, CancelledError), WhatsApp-Polling auf 5s

main.py

@@ -85,14 +85,22 @@ async def main(with_tui: bool = True) -> None:
         else:
             # 8b. Nur API – wartet auf Ctrl-C / SIGTERM
             logger.info("Running in API-only mode (no TUI)")
-            await api_task
+            try:
+                await api_task
+            except asyncio.CancelledError:
+                pass
     finally:
         logger.info("MCM shutting down…")
         scheduler.shutdown(wait=False)
+        api_task.cancel()
+        try:
+            await api_task
+        except asyncio.CancelledError:
+            pass
         await telegram.stop()
         await whatsapp.stop()
         await sms.stop()
-        api_task.cancel()
+        logger.info("MCM stopped.")
 
 
 if __name__ == "__main__":