fix(api): switch dataset query created_by_role to CreatorUserRole enums

Note: `CreatorUserRole.END_USER` is `"end_user"` (underscore), matching the prior value.

Tests not run (not requested).

api/core/rag/retrieval/dataset_retrieval.py

@@ -63,7 +63,7 @@ from libs.json_in_md_parser import parse_and_check_json_markdown
 from models import UploadFile
 from models.dataset import ChildChunk, Dataset, DatasetMetadata, DatasetQuery, DocumentSegment, SegmentAttachmentBinding
 from models.dataset import Document as DatasetDocument
-from models.enums import UserFrom
+from models.enums import CreatorUserRole
 from services.external_knowledge_service import ExternalDatasetService
 
 default_retrieval_model: dict[str, Any] = {
@@ -177,7 +177,11 @@ class DatasetRetrieval:
         )
 
         all_documents = []
-        user_from = UserFrom.ACCOUNT if invoke_from in {InvokeFrom.EXPLORE, InvokeFrom.DEBUGGER} else UserFrom.END_USER
+        user_from = (
+            CreatorUserRole.ACCOUNT
+            if invoke_from in {InvokeFrom.EXPLORE, InvokeFrom.DEBUGGER}
+            else CreatorUserRole.END_USER
+        )
         if retrieve_config.retrieve_strategy == DatasetRetrieveConfigEntity.RetrieveStrategy.SINGLE:
             all_documents = self.single_retrieve(
                 app_id,