curl --request POST \
  --url https://api.orafi.app/v1/webhook/register \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "url": "https://example.com/webhook"
}
'

{
  "success": true,
  "message": "Webhook registered successfully",
  "data": {
    "id": "webhook_abc123",
    "url": "https://example.com/webhook",
    "secret": "<string>",
    "events": [
      "payment.success",
      "payment.failed"
    ],
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z"
  }
}