Fixed type hint that was throwing an error

shared/workspaces/src/workspaces/services.py

@@ -312,7 +312,7 @@ class CapabilityQueue(CapabilityQueueIF):
         num_engines: int,
         capability_info: CapabilityInfo,
         workflow_service: "WorkflowService",
-    ) -> cls.EngineList:
+    ) -> NamedTuple[Queue[CapabilityEngine], List[CapabilityEngine]]:
         """
         Initialize available engine queue and list of in-use engines
         :return: EngineList