curl --request GET \
  --url 'http://localhost:8000/conversations' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "request_id": "string",
  "timestamp": "2026-07-24T12:00:00Z",
  "total": 1,
  "page": 1,
  "page_size": 1,
  "has_next": true,
  "has_prev": true,
  "items": [
    {
      "conversation_id": "string",
      "agent_id": "string",
      "message_count": 1,
      "created_at": "2026-07-24T12:00:00Z",
      "last_message_at": "2026-07-24T12:00:00Z",
      "total_tokens": 1
    }
  ]
}