workflows: log control number in create author task

ref: cern-sis/issues-inspire#542

workflows/dags/author/author_create/author_create_approved.py

@@ -102,6 +102,7 @@ def create_author_on_inspire(**context: dict) -> str:
         status = get_wf_status_from_inspire_response(response)
         if response.ok:
             control_number = response.json()["metadata"]["control_number"]
+            logger.info(f"Created author with control number: {control_number}")
             workflow_data["data"]["control_number"] = control_number
             workflow_management_hook.partial_update_workflow(
                 workflow_id=context["params"]["workflow_id"],