Retrieves an On Call Shadow configuration by ID

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

{
  "data": {
    "id": "abe668bd-a08b-44f4-a01f-f59bf9ce2261",
    "type": "on_call_shadows",
    "attributes": {
      "schedule_id": "2201c4fe-0d4b-4eb9-b119-9a03de5a1ffd",
      "shadowable_type": "User",
      "shadowable_id": "359",
      "shadow_user_id": 358,
      "starts_at": "2025-10-04T10:13:46.000-07:00",
      "ends_at": "2025-10-05T08:13:46.000-07:00",
      "created_at": "2025-10-04T08:13:46.229-07:00",
      "updated_at": "2025-10-04T08:13:46.229-07:00"
    }
  }
}