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": "dfb0f889-a6cd-4726-bf0c-07c5f8f0bd28",
    "type": "on_call_shadows",
    "attributes": {
      "schedule_id": "7cefb0bc-600f-498b-a5d2-a3a258a4e294",
      "shadowable_type": "User",
      "shadowable_id": "443",
      "shadow_user_id": 442,
      "starts_at": "2026-01-03T23:28:53.000-08:00",
      "ends_at": "2026-01-04T21:28:53.000-08:00",
      "created_at": "2026-01-03T21:28:53.174-08:00",
      "updated_at": "2026-01-03T21:28:53.174-08:00"
    }
  }
}