fix(BA-3692): Fix action signatures and scope types for list/search operations

- Changed ListModelServiceAction and SearchServicesAction to use USER scope instead of PROJECT scope
- Removed _project_id field and replaced with _user_id in action results
- Fixed handler to not access non-existent .success attribute on action results
- Removed unused result variables in update_route and delete_route handlers

These changes fix the mypy errors in PR #10033:
1. Missing positional argument "_project_id" - fixed by removing it and using USER scope
2. ActionResult has no attribute "success" - fixed by using SuccessResponseModel(success=True) directly

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: fregataa

src/ai/backend/manager/api/rest/service/handler.py

@@ -469,9 +469,9 @@ async def update_route(
             traffic_ratio=params.traffic_ratio,
         )
 
-        result = await self._model_serving.update_route.wait_for_complete(action)
+        await self._model_serving.update_route.wait_for_complete(action)
 
-        resp = SuccessResponseModel(success=result.success)
+        resp = SuccessResponseModel(success=True)
         return APIResponse.build(HTTPStatus.OK, resp)
 
     # ------------------------------------------------------------------
@@ -494,9 +494,9 @@ async def delete_route(
             route_id=path_params.route_id,
         )
 
-        result = await self._model_serving.delete_route.wait_for_complete(action)
+        await self._model_serving.delete_route.wait_for_complete(action)
 
-        resp = SuccessResponseModel(success=result.success)
+        resp = SuccessResponseModel(success=True)
         return APIResponse.build(HTTPStatus.OK, resp)
 
     # ------------------------------------------------------------------

src/ai/backend/manager/services/model_serving/actions/list_model_service.py

@@ -16,7 +16,6 @@
 class ListModelServiceAction(ModelServiceScopeAction):
     session_owener_id: uuid.UUID
     name: str | None
-    _project_id: uuid.UUID
 
     @override
     @classmethod
@@ -25,26 +24,26 @@ def operation_type(cls) -> ActionOperationType:
 
     @override
     def scope_type(self) -> ScopeType:
-        return ScopeType.PROJECT
+        return ScopeType.USER
 
     @override
     def scope_id(self) -> str:
-        return str(self._project_id)
+        return str(self.session_owener_id)
 
     @override
     def target_element(self) -> RBACElementRef:
-        return RBACElementRef(RBACElementType.PROJECT, str(self._project_id))
+        return RBACElementRef(RBACElementType.USER, str(self.session_owener_id))
 
 
 @dataclass
 class ListModelServiceActionResult(ModelServiceScopeActionResult):
     data: list[CompactServiceInfo]
-    _project_id: uuid.UUID
+    _user_id: uuid.UUID
 
     @override
     def scope_type(self) -> ScopeType:
-        return ScopeType.PROJECT
+        return ScopeType.USER
 
     @override
     def scope_id(self) -> str:
-        return str(self._project_id)
+        return str(self._user_id)

src/ai/backend/manager/services/model_serving/actions/search_services.py

@@ -16,7 +16,6 @@
 @dataclass
 class SearchServicesAction(ModelServiceScopeAction):
     session_owner_id: uuid.UUID
-    _project_id: uuid.UUID
     conditions: list[QueryCondition] = field(default_factory=list)
     offset: int = 0
     limit: int = 20
@@ -28,15 +27,15 @@ def operation_type(cls) -> ActionOperationType:
 
     @override
     def scope_type(self) -> ScopeType:
-        return ScopeType.PROJECT
+        return ScopeType.USER
 
     @override
     def scope_id(self) -> str:
-        return str(self._project_id)
+        return str(self.session_owner_id)
 
     @override
     def target_element(self) -> RBACElementRef:
-        return RBACElementRef(RBACElementType.PROJECT, str(self._project_id))
+        return RBACElementRef(RBACElementType.USER, str(self.session_owner_id))
 
 
 @dataclass
@@ -45,12 +44,12 @@ class SearchServicesActionResult(ModelServiceScopeActionResult):
     total_count: int
     offset: int
     limit: int
-    _project_id: uuid.UUID
+    _user_id: uuid.UUID
 
     @override
     def scope_type(self) -> ScopeType:
-        return ScopeType.PROJECT
+        return ScopeType.USER
 
     @override
     def scope_id(self) -> str:
-        return str(self._project_id)
+        return str(self._user_id)

src/ai/backend/manager/services/model_serving/services/model_serving.py

@@ -415,7 +415,7 @@ async def list_serve(self, action: ListModelServiceAction) -> ListModelServiceAc
                 )
                 for endpoint in endpoints
             ],
-            _project_id=action._project_id,
+            _user_id=action.session_owener_id,
         )
 
     async def search_services(self, action: SearchServicesAction) -> SearchServicesActionResult:
@@ -429,7 +429,7 @@ async def search_services(self, action: SearchServicesAction) -> SearchServicesA
             total_count=result.total_count,
             offset=action.offset,
             limit=action.limit,
-            _project_id=action._project_id,
+            _user_id=action.session_owner_id,
         )
 
     async def check_user_access(self) -> None: