curl --request GET \
  --url http://localhost:8080/promo-offers/templates/{template_id}

{
  "id": 123,
  "name": "<string>",
  "offer_type": "<string>",
  "message_text": "<string>",
  "button_text": "<string>",
  "valid_hours": 123,
  "discount_percent": 123,
  "bonus_amount_kopeks": 123,
  "test_squad_uuids": [
    "<string>"
  ],
  "is_active": true,
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "active_discount_hours": 123,
  "test_duration_hours": 123,
  "created_by": 123
}