Retrieves a heartbeat

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

{
  "data": {
    "id": "32a299a3-745f-4680-b7d2-29d1ff13c16e",
    "type": "heartbeats",
    "attributes": {
      "slug": "odit-beatae-autem-in",
      "name": "Odit beatae autem in.",
      "description": "Illum non quia quibusdam.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "496780f9-d2c5-47dd-99ea-31f989e705d9",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "500",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/32a299a3-745f-4680-b7d2-29d1ff13c16e/ping",
      "secret": "heartbeat_2347fb57863434f8fde7720ed06af6cd0b095629292ea084a9fd93b504210bfc",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-02-09T17:22:41.814-08:00",
      "created_at": "2026-02-09T17:22:41.814-08:00"
    }
  }
}