curl --request GET \
  --url https://api.rewind.rest/v1/collecting/calendar \
  --header 'Authorization: Bearer <token>'

{
  "year": 2026,
  "days": [
    {
      "date": "2026-01-15",
      "count": 3
    },
    {
      "date": "2026-02-01",
      "count": 5
    }
  ],
  "total": 139,
  "max_day": {
    "date": "2026-02-01",
    "count": 5
  }
}