build: Add missing Celery task decorators, and add CI check for it (#33154)

openedx/core/djangoapps/content_staging/tasks.py

@@ -6,6 +6,7 @@ import logging
 
 from celery import shared_task
 from celery_utils.logged_task import LoggedTask
+from edx_django_utils.monitoring import set_code_owner_attribute
 
 from .data import CLIPBOARD_PURPOSE
 from .models import StagedContent
@@ -14,6 +15,7 @@ log = logging.getLogger(__name__)
 
 
 @shared_task(base=LoggedTask)
+@set_code_owner_attribute
 def delete_expired_clipboards(staged_content_ids: list[int]):
     """
     A Celery task to delete StagedContent clipboard entries that are no longer