Get the email activity timeline of an expiry

curl 'https://api.expiryedge.com/v1/getExpiryActivity?expiry_id=exp_4Tq9sLm2' \
  -H "Authorization: Bearer $EXPIRYEDGE_API_KEY"

{
  "expiry_id": "exp_4Tq9sLm2",
  "stats": {
    "sent_count": 2,
    "delivered_count": 2,
    "opened_count": 1,
    "last_event_at": "2026-09-27T14:05:00.000Z"
  },
  "events": [
    {
      "id": "evt_R2m8Tq",
      "event_type": "sent",
      "timestamp": "2026-09-26T09:00:04.000Z",
      "contact_email": "billing@contosolegal.com",
      "contact_display": "Contoso Legal Billing",
      "message_id": "msg_01J8ZK",
      "subject": "Reminder: State Dental License expires in 18 days",
      "clicked_url": null,
      "bounce_type": null,
      "failure_reason": null,
      "reply_text": null,
      "provider": "resend"
    },
    {
      "id": "evt_W7n3Ya",
      "event_type": "opened",
      "timestamp": "2026-09-27T14:05:00.000Z",
      "contact_email": "billing@contosolegal.com",
      "contact_display": "Contoso Legal Billing",
      "message_id": "msg_01J8ZK",
      "subject": "Reminder: State Dental License expires in 18 days",
      "clicked_url": null,
      "bounce_type": null,
      "failure_reason": null,
      "reply_text": null,
      "provider": "resend"
    }
  ],
  "contact_count": 1
}