v4.9.0

New

• Async mode for InvoiceSalesOrders. As of October 2026 Exact only supports the async mode of this endpoint. InvoiceSalesOrder now has Mode and ProcessID. Before, Mode was silently dropped from the request. The new InvoiceSalesOrderResult entity fetches the result of the background process. See the README for an example. #700

$invoiceSalesOrder->Mode = 1; // Async
$invoiceSalesOrder->save();

$results = (new \Picqer\Financials\Exact\InvoiceSalesOrderResult($connection))
    ->get(['ProcessID' => "guid'{$invoiceSalesOrder->ProcessID}'"]);

Closes #690, #692, #693