Retrieves an incident event service

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

{
  "data": {
    "id": "6a1fea34-d281-43b7-97e0-e9215d027e7e",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "099c3fe6-5743-44af-9964-7bebc714c7f8",
      "service_id": "2830acba-ca24-4abf-b50c-cb556fa9766a",
      "status": "partial_outage"
    }
  }
}