task_id 轮询任务结果。GET /v1/videos/{task_id} 查询。curl --location --request GET '/v1/video/generations/'{
"id": "task_xxxxxxxxxxxxx",
"task_id": "task_xxxxxxxxxxxxx",
"object": "video",
"model": "pixverse-c1",
"status": "in_progress",
"progress": 50,
"created_at": 1712345678
}