Fix critical bugs

src/capa_de_integracion/services/notifications.py

@@ -17,6 +17,9 @@ logger = logging.getLogger(__name__)
 
 PREFIX_PO_PARAM = "notification_po_"
 
+# Keep references to background tasks to prevent garbage collection
+_background_tasks: set[asyncio.Task] = set()
+
 
 class NotificationManagerService:
     """Manages notification processing and integration with conversations.
@@ -127,6 +130,8 @@ class NotificationManagerService:
                 )
 
         # Fire and forget - don't await
-        _task = asyncio.create_task(save_notification_to_firestore())
+        task = asyncio.create_task(save_notification_to_firestore())
         # Store reference to prevent premature garbage collection
-        del _task
+        _background_tasks.add(task)
+        # Remove from set when done to prevent memory leak
+        task.add_done_callback(_background_tasks.discard)