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": "715bcf1e-efed-408d-b994-a3c4a847b56b",
    "type": "on_call_shadows",
    "attributes": {
      "schedule_id": "bddab6ff-e9f6-4b7c-a8bc-bc34c5e22ca8",
      "shadowable_type": "User",
      "shadowable_id": "391",
      "shadow_user_id": 390,
      "starts_at": "2025-10-24T17:41:24.000-07:00",
      "ends_at": "2025-10-25T15:41:24.000-07:00",
      "created_at": "2025-10-24T15:41:24.959-07:00",
      "updated_at": "2025-10-24T15:41:24.959-07:00"
    }
  }
}