POST /v2/post/publish/video/init/ → 200 OK
{
  "data": {
    "publish_id": "v_pub_file~v2-1.7483920183",
    "upload_url": "https://open-upload.tiktokapis.com/video/..."
  }
}

PUT upload_url (chunk 1/1) → 200 OK

POST /v2/post/publish/status/fetch/ → 200 OK
{
  "data": {
    "status": "PUBLISH_COMPLETE",
    "permalink": "https://www.tiktok.com/@user/video/7483920183"
  }
}