task_id 轮询任务结果。GET /v1/video/generations/{task_id}GET /v1/videos/{task_id}curl --location --request GET '/kling/v1/videos/text2video/'{
"id": "string",
"task_id": "string",
"object": "video",
"model": "string",
"status": "",
"progress": 0,
"created_at": 0,
"completed_at": 0,
"metadata": {
"url": "string"
}
}