curl --request GET \
  --url http://localhost:8080/partners/stats/top-referrers

{
  "items": [
    {
      "id": 123,
      "full_name": "<string>",
      "referrals_count": 123,
      "total_earnings_kopeks": 123,
      "telegram_id": 123,
      "username": "<string>",
      "first_name": "<string>",
      "last_name": "<string>",
      "referral_code": "<string>"
    }
  ],
  "days": 123
}