获取任务状态

{
  "id": "task_01JXYZEXAMPLE",
  "model": "YOUR_VIDEO_MODEL_ID",
  "status": "succeeded",
  "created_at": 1787600000,
  "updated_at": 1787600060,
  "content": {
    "video_url": "https://cdn.example.com/generated/video.mp4",
    "last_frame_url": "https://cdn.example.com/generated/last-frame.png"
  },
  "resolution": "720p",
  "ratio": "16:9",
  "duration": 5,
  "framespersecond": 24,
  "generate_audio": true,
  "usage": {
    "completion_tokens": 125000,
    "total_tokens": 125000
  },
  "error": null
}