Retrieves a heartbeat

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

{
  "data": {
    "id": "ad1d7a8f-3488-4c93-a690-461b5be102c3",
    "type": "heartbeats",
    "attributes": {
      "slug": "quia-unde-et-est",
      "name": "Quia unde et est.",
      "description": "Quibusdam eius libero qui.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "35fd92e5-09c5-447e-abbe-94745493b818",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "476",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/ad1d7a8f-3488-4c93-a690-461b5be102c3/ping",
      "secret": "heartbeat_0835b15286c65fba165dc3e9819b6869e6c8b48ca06616c7a2c5a6a966fa3e05",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-01-28T03:21:45.008-08:00",
      "created_at": "2026-01-28T03:21:45.008-08:00"
    }
  }
}