{
  "service": "Auth Worker",
  "version": "2.0",
  "endpoints": {
    "POST /auth": "用户鉴权，传 { \"phone\" } → 未注册自动给3天试用，已注册返回VIP",
    "POST /admin/add-user": "添加/更新用户，传 { \"phone\", \"admin_key\", \"expires_at?\" }"
  }
}