Creates a schedule rotation active day

curl --request POST \
  --url https://api.rootly.com/v1/schedule_rotations/{schedule_rotation_id}/schedule_rotation_active_days \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "schedule_rotation_active_days",
    "attributes": {
      "day_name": "S",
      "active_time_attributes": [
        {
          "start_time": "<string>",
          "end_time": "<string>"
        }
      ]
    }
  }
}
'

{
  "data": {
    "id": "d78b3116-09f8-437c-b00b-2157e111dcec",
    "type": "schedule_rotation_active_days",
    "attributes": {
      "schedule_rotation_id": "9530fc31-6b3a-4ee8-9951-603a2587ed05",
      "day_name": "M",
      "created_at": "2026-01-19T09:14:43.856-08:00",
      "updated_at": "2026-01-19T09:14:43.856-08:00",
      "active_time_attributes": [
        {
          "start_time": "07:30",
          "end_time": "16:30"
        },
        {
          "start_time": "17:00",
          "end_time": "20:00"
        }
      ]
    }
  }
}