Retrieves an incident event functionality

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

{
  "data": {
    "id": "81f75ec4-22e5-4d8e-98a8-a0b38cfc35f1",
    "type": "incident_event_functionalities",
    "attributes": {
      "incident_event_id": "a668e2a6-6a48-4cbc-be12-64647f2d17fc",
      "functionality_id": "b31493a3-b9fb-4705-aa9c-ba9db3ac233f",
      "status": "partial_outage"
    }
  }
}