{
  "demo_only": true,
  "contains_real_student_data": false,
  "batch_id": "DEMO-ADMIN-001",
  "items": [
    {
      "dispatch_id": "DEMO-DISPATCH-001",
      "recipient": "student-example@example.invalid",
      "credential_content": "NOT_INCLUDED",
      "action": "send_notification_after_teacher_approval",
      "status": "pending_teacher_approval",
      "receipt": null
    }
  ],
  "rules": [
    "本檔不包含任何密碼或權杖",
    "授權與寄送回條分開記錄",
    "本網站不會寄信"
  ]
}