fix: redacting user retirement data in lms

Author: ktyagiapphelix2u

openedx/core/djangoapps/user_api/accounts/views.py

@@ -1046,8 +1046,8 @@ def cleanup(self, request):
             if len(usernames) != len(retirements):
                 raise UserRetirementStatus.DoesNotExist("Not all usernames exist in the COMPLETE state.")
 
-            # Redact PII fields instead of deleting records
-            # This ensures Fivetran syncs redacted data to Snowflake instead of creating soft deletes with PII
+            # Redact PII fields instead of deleting records to prevent ETL tools
+            # from creating soft deletes with visible PII in downstream data warehouses
             for retirement in retirements:
                 redacted_value = f"jenkins-{jenkins_run_id}-{retirement.id}"
                 retirement.original_username = redacted_value