Retrieves an incident event service

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

{
  "data": {
    "id": "a791da2f-b83a-448d-85c1-60153d580e80",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "f539d9e9-c2c1-4172-810b-8dbfd7e84073",
      "service_id": "1f81453c-5836-496f-b3bb-27eb0e7975f1",
      "status": "partial_outage"
    }
  }
}