Retrieves an incident event service

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

{
  "data": {
    "id": "98f70bf8-6c00-4b89-9ccc-d0b24580cc57",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "900b6bef-0053-4c2a-b81c-eb98aa000afd",
      "service_id": "d9cf2fa4-f431-4d6e-b7f7-6006bec6e8e6",
      "status": "partial_outage"
    }
  }
}