Retrieves an incident event service

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

{
  "data": {
    "id": "928cd6b8-e80d-400f-8b2e-a357155ed03a",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "02c75025-4159-49dc-9797-cab062e660a6",
      "service_id": "d4c0b7fb-849f-4981-a777-4ab7311dc650",
      "status": "partial_outage"
    }
  }
}