WS-651: catches and saves RH CARTA event

• implemented lookup_capability_request_version
• implemented on_carta_ready
• added tests
• Black reformatting

shared/workspaces/test/test_capability_service.py

@@ -65,7 +65,7 @@ class TestCapabilityService:
             "service": "capability",
             "routing_key": "capability",
             "carta_url": carta_url,
-            "subject": "Your CARTA Session is ready!",
+            "subject": {"workflow_request_id": wf_request_id},
             "type": "carta-ready",
         }
 
@@ -75,7 +75,7 @@ class TestCapabilityService:
             "workspaces.capability.services.capability_info.CapabilityInfo.lookup_execution_by_workflow_request_id",
             return_value=mock_capability_execution,
         ):
-            mock_capability_service.on_carta_ready(wf_request_id, **fake_carta_ready_msg)
+            mock_capability_service.on_carta_ready(**fake_carta_ready_msg)
             assert mock_capability_info.save_entity.call_count == save_entity_old_call_count + 1
 
             (request_version,) = mock_capability_info.save_entity.call_args.args