查询任务状态（GET）

{
    "draft_error": "",
    "draft_id": "",
    "draft_url": "",
    "error": "",
    "id": "4a5bd89f-30f3-4700-a12c-121bd1f439f4",
    "message": "处理完成",
    "progress": 100,
    "pure_trans": false,
    "result": {
        "draft_id": "dfd_cat_1776218433_6559ef10",
        "draft_url": "https://www.vectcut.com/draft/downloader?draft_id=dfd_cat_1776218433_6559ef10&is_capcut=0",
        "inverted_mask_url": "https://player.install-ai-guider.top/removebg_tmp/vectcut_koubo_tmp_file_4cd3e220-edb1-4463-84de-de26624189e4_mask_inverted.mp4",
        "mask_url": "https://player.install-ai-guider.top/removebg_tmp/vectcut_koubo_tmp_file_77135ebb-6db8-4ec2-95e5-bc059906b942_mask.mp4",
        "purchase_link": "https://www.vectcut.com"
    },
    "status": "success",
    "success": true,
    "task_id": "4a5bd89f-30f3-4700-a12c-121bd1f439f4",
    "video_url": "https://player.install-ai-guider.top/example/koubo_source.mp4"
}