Creates an incident event

curl --request POST \
  --url https://api.rootly.com/v1/incidents/{incident_id}/events \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "incident_events",
    "attributes": {
      "event": "<string>",
      "visibility": "internal"
    }
  }
}'

{
  "data": {
    "id": "c9e00650-9cc2-45b0-b193-00345a247f59",
    "type": "incident_events",
    "attributes": {
      "event": "New Event",
      "event_raw": "New Event",
      "kind": "event",
      "source": "web",
      "visibility": "external",
      "user_display_name": "Rootly",
      "occurred_at": "2025-08-05T00:31:22.852-07:00",
      "starred_at": null,
      "created_at": "2025-08-05T00:31:22.852-07:00",
      "updated_at": "2025-08-05T00:31:22.852-07:00"
    }
  }
}