Retrieves a heartbeat

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

{
  "data": {
    "id": "95a8ed96-6aab-4c02-9680-05eba0b10284",
    "type": "heartbeats",
    "attributes": {
      "slug": "dolore-facilis-qui-impedit",
      "name": "Dolore facilis qui impedit.",
      "description": "Asperiores voluptatem fugiat eius.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "6ce17a38-fc31-4ef1-ad8a-e2c57ca7cd5a",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "419",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/95a8ed96-6aab-4c02-9680-05eba0b10284/ping",
      "secret": "heartbeat_196f6e11c952ccb0cec84c2b221a597973e68a3154b492ccaff78cb6df7939e1",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-01-27T00:55:55.076-08:00",
      "created_at": "2026-01-27T00:55:55.076-08:00"
    }
  }
}