Get functionality uptime chart

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

{
  "data": {
    "2025-08-19": 100,
    "2025-08-20": 100,
    "2025-08-21": 100,
    "2025-08-22": 100,
    "2025-08-23": 100,
    "2025-08-24": 100,
    "2025-08-25": 100,
    "2025-08-26": 100,
    "2025-08-27": 100,
    "2025-08-28": 100,
    "2025-08-29": 100,
    "2025-08-30": 100,
    "2025-08-31": 50,
    "2025-09-01": 0,
    "2025-09-02": 100,
    "2025-09-03": 100
  }
}