SubmitTaskResponse

{
    "success": true,
    "data": {
        "taskId": "veo3:a1b2c3d4-e5f6-7890-abcd-ef1234567890",
        "pollingUrl": "https://asyncdata.net/source/veo3:a1b2c3d4-e5f6-7890-abcd-ef1234567890",
        "status": "processing",
        "message": "任务提交成功，正在处理中"
    }
}