Retrieves an incident event service

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

{
  "data": {
    "id": "86fed620-4a65-4d2e-8673-102e690b7077",
    "type": "incident_event_services",
    "attributes": {
      "incident_event_id": "6943cec0-365d-48da-9b43-d69e39dcb0a5",
      "service_id": "4f10e176-a0d4-42ee-82d4-a92627cb9672",
      "status": "partial_outage"
    }
  }
}