Retrieves a heartbeat

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

{
  "data": {
    "id": "9c72beb5-a2d9-4298-87e4-abe156749869",
    "type": "heartbeats",
    "attributes": {
      "slug": "voluptatem-harum-qui-ut",
      "name": "Voluptatem harum qui ut.",
      "description": "Maiores pariatur exercitationem sed.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "ce3cbc8e-9ad9-4038-8bec-f149d3bbdcf8",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "476",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/9c72beb5-a2d9-4298-87e4-abe156749869/ping",
      "secret": "heartbeat_932628833a085245ebc2810ef652eb3dc5783cf7bf9ca2829c73f2833c7ed952",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-02-02T19:24:05.834-08:00",
      "created_at": "2026-02-02T19:24:05.834-08:00"
    }
  }
}