fix(workforce): Fix awaiting dynamic worker start

Author: coolbeevip

camel/societies/workforce/workforce.py

@@ -3848,7 +3848,9 @@ async def _create_worker_node_for_task(self, task: Task) -> Worker:
             role=new_node_conf.role,
             metadata={'description': new_node_conf.description},
         )
-        self._child_listening_tasks.append(await new_node.start())
+        self._child_listening_tasks.append(
+            asyncio.create_task(new_node.start())
+        )
         return new_node
 
     async def _create_new_agent(self, role: str, sys_msg: str) -> ChatAgent: