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

{
  "data": {
    "2025": [
      {
        "day": 2,
        "cumulative_mi": 4.8
      },
      {
        "day": 5,
        "cumulative_mi": 12.6
      }
    ],
    "2026": [
      {
        "day": 1,
        "cumulative_mi": 5.2
      },
      {
        "day": 3,
        "cumulative_mi": 9.3
      },
      {
        "day": 5,
        "cumulative_mi": 16.1
      }
    ]
  }
}