curl --request GET \
  --url https://api.arnio.co/api/v1/messages \
  --header 'X-API-Key: <api-key>'

{
  "messages": [
    {
      "id": "GUID",
      "from": "+15551234567",
      "to": "+15557654321",
      "direction": "outbound",
      "message": "Hello",
      "timestamp": "2025-08-28T12:34:56Z",
      "media": []
    }
  ]
}