feat: Add an experimental custom attr for automatic Celery task code owner (#33180)

lms/celery.py

@@ -7,6 +7,10 @@ Taken from: https://celery.readthedocs.org/en/latest/django/first-steps-with-dja
 
 import os
 
+from celery.signals import task_prerun
+from django.dispatch import receiver
+from edx_django_utils.monitoring import set_custom_attribute
+
 # Patch the xml libs before anything else.
 from openedx.core.lib.safe_lxml import defuse_xml_libs
 
@@ -17,3 +21,20 @@ defuse_xml_libs()
 # and then instantiate the Celery singleton.
 os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'lms.envs.production')
 from openedx.core.lib.celery import APP  # pylint: disable=wrong-import-position,unused-import
+
+
+@receiver(task_prerun)
+def set_code_owner_on_celery_tasks(*, task, **kwargs):
+    """
+    Sets the `code_owner` custom attribute on all Celery tasks, obviating the
+    need for the set_code_owner_attribute task decorator.
+
+    ...or rather, we're not yet sure whether this works, so we're setting a
+    different custom attribute first.
+
+    See https://github.com/openedx/edx-platform/issues/33179 for details.
+    """
+    try:
+        set_custom_attribute("auto_celery_code_owner_module", task.__module__)
+    except Exception as e:  # pylint: disable=broad-except
+        set_custom_attribute("auto_celery_code_owner_error", repr(e))