Get functionality uptime chart

curl --request GET \
  --url https://api.rootly.com/v1/functionalities/{id}/uptime_chart \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "2026-01-30": 100,
    "2026-01-31": 100,
    "2026-02-01": 100,
    "2026-02-02": 100,
    "2026-02-03": 100,
    "2026-02-04": 100,
    "2026-02-05": 100,
    "2026-02-06": 100,
    "2026-02-07": 100,
    "2026-02-08": 100,
    "2026-02-09": 100,
    "2026-02-10": 100,
    "2026-02-11": 50,
    "2026-02-12": 0,
    "2026-02-13": 100,
    "2026-02-14": 100
  }
}