Retrieves a heartbeat

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

{
  "data": {
    "id": "28a20883-ce3e-489d-aa64-653afd8c1c79",
    "type": "heartbeats",
    "attributes": {
      "slug": "et-tenetur-ut-corrupti",
      "name": "Et tenetur ut corrupti.",
      "description": "Aut vel possimus aut.",
      "alert_summary": "API is down",
      "alert_description": null,
      "alert_urgency_id": "8b26a95f-028d-42f0-bd3b-e1ee800f96c0",
      "interval": 1,
      "interval_unit": "minutes",
      "notification_target_id": "476",
      "notification_target_type": "User",
      "ping_url": "http://localhost:3001/v1/heartbeats/28a20883-ce3e-489d-aa64-653afd8c1c79/ping",
      "secret": "heartbeat_c90bd34b22f1a1f437911e8ee75418bc681999bbdaf60c55b2d06fd81ded230b",
      "email_address": "[email protected]",
      "last_pinged_at": null,
      "expires_at": null,
      "enabled": false,
      "status": "waiting",
      "updated_at": "2026-02-04T14:54:31.232-08:00",
      "created_at": "2026-02-04T14:54:31.232-08:00"
    }
  }
}