Retrieves an incident event service

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

{
  "data": {
    "id": "ea955c7f-b65d-4704-9c2c-07511f775323",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "c70af651-2477-40f6-a7e2-6d87beeaadcf",
      "service_id": "909a1950-e032-401c-b2d4-69e38d02aba0",
      "status": "partial_outage"
    }
  }
}