GET /emails/search?q=lunch: Status 200
[
  {
    "id": 4,
    "sender": "alice@work.com",
    "recipient": "you@email.com",
    "subject": "Lunch?",
    "body": "Free for lunch today?",
    "timestamp": "2025-10-31T00:31:09.568128",
    "read": false
  }
]