[Bug]:大模型限流需支持配置，现在超过agent不返回

18:12:01.241 [boundedElastic-1] DEBUG i.agentscope.core.model.OpenAIClient - SSE data: {"code":"429","message":"{\"Response\":{\"Error\":{\"Message\":\"The request has triggered the maximum tokens per minute (MAX_TPM) limit. Please try again later.\",\"Code\":\"RequestLimitExceeded.TPM\"}}}\n","status":"error"} 大模型报token超限，竟然不外抛，而是打印个日志就没下文了，任务也不结束，这是不是有问题，需要思考如何做限流，尽量能支持配置