Get functionality uptime chart

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

{
  "data": {
    "2026-01-09": 100,
    "2026-01-10": 100,
    "2026-01-11": 100,
    "2026-01-12": 100,
    "2026-01-13": 100,
    "2026-01-14": 100,
    "2026-01-15": 100,
    "2026-01-16": 100,
    "2026-01-17": 100,
    "2026-01-18": 100,
    "2026-01-19": 100,
    "2026-01-20": 100,
    "2026-01-21": 50,
    "2026-01-22": 0,
    "2026-01-23": 100,
    "2026-01-24": 100
  }
}