Retrieves a schedule shifts

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

{
  "data": [
    {
      "id": "d46062bf-84d0-5bdd-a43a-1fcd307f174c",
      "type": "shifts",
      "attributes": {
        "schedule_id": "139f42b5-91a7-4d4f-8de4-f4c19837e37d",
        "rotation_id": "b6ccfad0-2714-4509-bb98-99184cc27ea4",
        "starts_at": "2025-10-09T06:40:29.000-07:00",
        "ends_at": "2025-10-09T10:40:29.000-07:00",
        "is_override": true
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "491",
            "type": "users"
          }
        }
      }
    },
    {
      "id": "f7365c2e-9976-5bd8-9cbf-3a3eb68e3430",
      "type": "shifts",
      "attributes": {
        "schedule_id": "139f42b5-91a7-4d4f-8de4-f4c19837e37d",
        "rotation_id": "2cbbffbd-a52e-4db8-a76f-0f2a9de86917",
        "starts_at": "2025-10-09T11:40:30.000-07:00",
        "ends_at": "2025-10-09T15:40:30.000-07:00",
        "is_override": false
      },
      "relationships": {
        "shift_override": {
          "data": null
        },
        "user": {
          "data": {
            "id": "495",
            "type": "users"
          }
        }
      }
    }
  ]
}