curl -X POST https://api.vozagent.ai/v1/webhooks \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My Webhook",
    "url": "https://yourapp.com/webhooks",
    "events": ["contact.created", "call.completed"]
  }'

{
  "id": "wh-new-a1b2c3d4-e5f6-a7b8",
  "url": "https://yourapp.com/webhooks",
  "events": ["contact.created", "call.completed"],
  "is_active": true,
  "secret": "whsec_abc123xyz456...",
  "created_at": "2024-01-15T12:00:00Z"
}