Retrieves an incident event functionality

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

{
  "data": {
    "id": "a1241251-8607-4d56-818a-dcad7044c1d3",
    "type": "incident_event_functionalities",
    "attributes": {
      "incident_event_id": "289ec239-c4ca-41e4-9b73-2ee3b8da6d34",
      "functionality_id": "39be0da5-1c4f-42b5-9957-98dcfaf9dd7a",
      "status": "partial_outage"
    }
  }
}