curl --request GET \
  --url http://localhost:8080/contests/referral/{contest_id}/events

{
  "items": [
    {
      "id": 123,
      "contest_id": 123,
      "referrer": {
        "id": 123,
        "telegram_id": 123,
        "username": "<string>",
        "full_name": "<string>"
      },
      "referral": {
        "id": 123,
        "telegram_id": 123,
        "username": "<string>",
        "full_name": "<string>"
      },
      "event_type": "<string>",
      "amount_kopeks": 123,
      "amount_rubles": 123,
      "occurred_at": "2023-11-07T05:31:56Z"
    }
  ],
  "total": 123,
  "limit": 123,
  "offset": 123
}