refactor: select in 13 small service files (#34371)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/services/workflow/workflow_converter.py

@@ -6,6 +6,7 @@ from graphon.model_runtime.entities.llm_entities import LLMMode
 from graphon.model_runtime.utils.encoders import jsonable_encoder
 from graphon.nodes import BuiltinNodeTypes
 from graphon.variables.input_entities import VariableEntity
+from sqlalchemy import select
 from typing_extensions import TypedDict
 
 from core.app.app_config.entities import (
@@ -648,10 +649,10 @@ class WorkflowConverter:
         :param api_based_extension_id: api based extension id
         :return:
         """
-        api_based_extension = (
-            db.session.query(APIBasedExtension)
+        api_based_extension = db.session.scalar(
+            select(APIBasedExtension)
             .where(APIBasedExtension.tenant_id == tenant_id, APIBasedExtension.id == api_based_extension_id)
-            .first()
+            .limit(1)
         )
 
         if not api_based_extension: