Retrieves a schedule shifts

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

{
  "data": [
    {
      "id": "7a19133d-4f43-4286-8266-7770f2b0347d",
      "type": "shifts",
      "attributes": {
        "schedule_id": "28ee0fa3-3a8e-4200-ad0f-6d1b4a51343a",
        "rotation_id": "8488f637-3633-4b68-b6a5-a8f7652ef901",
        "user_id": 1009,
        "starts_at": "2026-02-09T03:30:52.000-08:00",
        "ends_at": "2026-02-09T07:30:52.000-08:00",
        "is_override": true
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "1009",
            "type": "users"
          }
        }
      }
    },
    {
      "id": "88f1bb65-5e76-5326-8dbe-964d776a836d",
      "type": "shifts",
      "attributes": {
        "schedule_id": "28ee0fa3-3a8e-4200-ad0f-6d1b4a51343a",
        "rotation_id": "ec8a636d-f652-43e3-9e01-900c9d7f4df0",
        "user_id": 1013,
        "starts_at": "2026-02-09T08:30:53.000-08:00",
        "ends_at": "2026-02-09T12:30:53.000-08:00",
        "is_override": false
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "1013",
            "type": "users"
          }
        }
      }
    }
  ]
}