Listar todos os endpoints de webhook do usuário atual

curl --request GET \
  --url https://api.wappfy.io/api/webhooks \
  --header 'Authorization: Bearer <token>'

[
  {
    "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "user_id": "<string>",
    "url": "https://example.com/webhook",
    "events": [
      "message.received",
      "message.sent"
    ],
    "retry_count": 3,
    "timeout_ms": 5000,
    "is_active": true,
    "created_at": "<string>",
    "updated_at": "<string>",
    "secret": "<string>",
    "description": "Production webhook",
    "instance_id": "<string>",
    "headers": {}
  }
]