fix(documents): Remove unsupported send_immediately parameter

- Fixed TypeError in create_notification_async() call
- Removed send_immediately parameter (only supported by create_notification)
- All 16 tests now pass

backend/documents/notification_signals.py

@@ -485,7 +485,6 @@ def create_document_ready_notification(document, recipient, send_immediately=Tru
             ),
             'sent_to_all': document.sent_to_all,
         },
-        send_immediately=send_immediately  # Передаём параметр
     )
     
     if notification: