invoice_get_doc = {
    "tags": ["Invoices"],
    "summary": "Lista todas as faturas",
    "responses": {
        "200": {
            "description": "Lista de faturas",
            "examples": {
                "application/json": [
                    {"id": 1, "amount": 100.50, "user_id": 1}
                ]
            }
        }
    }
}