Updated dataset query attribution to use the UserFrom enum in the callback and hit-testing paths, matching the retrieval flow and removing literal role strings. Adjusted api/core/callback_handler/index_tool_callback_handler.py and api/services/hit_testing_service.py where DatasetQuery records are created.

fix(api): use UserFrom for dataset query created_by_role

Tests not run (not requested).

api/services/hit_testing_service.py

@@ -13,6 +13,7 @@ from core.rag.retrieval.retrieval_methods import RetrievalMethod
 from extensions.ext_database import db
 from models import Account
 from models.dataset import Dataset, DatasetQuery
+from models.enums import UserFrom
 
 logger = logging.getLogger(__name__)
 
@@ -98,7 +99,7 @@ class HitTestingService:
                 content=json.dumps(dataset_queries),
                 source="hit_testing",
                 source_app_id=None,
-                created_by_role="account",
+                created_by_role=UserFrom.ACCOUNT,
                 created_by=account.id,
             )
             db.session.add(dataset_query)
@@ -138,7 +139,7 @@ class HitTestingService:
             content=query,
             source="hit_testing",
             source_app_id=None,
-            created_by_role="account",
+            created_by_role=UserFrom.ACCOUNT,
             created_by=account.id,
         )