Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

如果查询到的源数据量比较大，生成报告时大模型会报错：
{
"error": {
"message": "litellm.BadRequestError: OpenAIException - input characters limit is 516096. Received Model Group=qwen3-coder-480b-a35b-instruct\nAvailable Model Group Fallbacks=None",
"type": "invalid_request_error",
"param": null,
"code": "400"
}
}

Expected Behavior

No response

Steps To Reproduce

No response

Environment

Spring AI Alibaba DataAgent version(s):

Debug logs

Anything else?

No response