Retrieves a schedule shifts

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

{
  "data": [
    {
      "id": "41bb2577-9eb3-496f-8fdd-e2c71483e15f",
      "type": "shifts",
      "attributes": {
        "schedule_id": "5ce1b8ac-66da-476e-8aa5-d6b6225a1997",
        "rotation_id": "208cfa0a-d882-4e0a-a254-e4264999f832",
        "starts_at": "2025-08-08T07:16:18.000-07:00",
        "ends_at": "2025-08-08T11:16:18.000-07:00",
        "is_override": true
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "449",
            "type": "users"
          }
        }
      }
    },
    {
      "id": "6e28fe04-5470-42b1-aa75-35e35fbfabb7",
      "type": "shifts",
      "attributes": {
        "schedule_id": "5ce1b8ac-66da-476e-8aa5-d6b6225a1997",
        "rotation_id": "543107e8-8167-4a36-b69a-90d6cab83735",
        "starts_at": "2025-08-08T12:16:18.000-07:00",
        "ends_at": "2025-08-08T16:16:18.000-07:00",
        "is_override": false
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "453",
            "type": "users"
          }
        }
      }
    }
  ]
}