Fix batch history purge not updating user's update_time

The batch purge_history_datasets celery task uses raw SQL for bulk
operations, bypassing SQLAlchemy's onupdate=now trigger on User.update_time.
This caused archiving with purge to leave the user's update_time stale.

Also forwards preserve_owner_update_time through to the batch task so
admin-initiated purges of other users' histories still preserve the
owner's update_time.

lib/galaxy/celery/tasks.py

@@ -46,6 +46,7 @@ from galaxy.model import (
     Job,
     User,
 )
+from galaxy.model.orm.now import now
 from galaxy.model.scoped_session import galaxy_scoped_session
 from galaxy.objectstore import BaseObjectStore
 from galaxy.objectstore.caching import check_caches
@@ -168,6 +169,9 @@ def purge_history_datasets(
     user = history.user
     if user:
         user.calculate_and_set_disk_usage(object_store)
+        if not request.preserve_owner_update_time:
+            user.update_time = now()
+            sa_session.commit()
     # Remove underlying dataset files from object store
     dataset_manager.purge_datasets(PurgeDatasetsTaskRequest(dataset_ids=dataset_ids))
 

lib/galaxy/managers/histories.py

@@ -296,7 +296,11 @@ class HistoryManager(sharable.SharableModelManager[model.History], deletable.Pur
         if self.app.config.enable_celery_tasks:
             from galaxy.celery.tasks import purge_history_datasets
 
-            request = PurgeHistoryDatasetsTaskRequest(history_id=item.id)
+            preserve_owner_update_time = kwargs.get("preserve_owner_update_time", False)
+            request = PurgeHistoryDatasetsTaskRequest(
+                history_id=item.id,
+                preserve_owner_update_time=preserve_owner_update_time,
+            )
             user = item.user
             result = purge_history_datasets.delay(request=request, task_user_id=user.id if user else None)
         else:

lib/galaxy/schema/tasks.py

@@ -141,6 +141,7 @@ class PurgeDatasetsTaskRequest(Model):
 
 class PurgeHistoryDatasetsTaskRequest(Model):
     history_id: int
+    preserve_owner_update_time: bool = False
 
 
 class TaskState(str, Enum):