fix: add index on order_transaction_id

src/Migration/Migration1709633086AddOrderTransactionIdIndex.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PayonePayment\Migration;
+
+use Doctrine\DBAL\Connection;
+use Shopware\Core\Framework\Migration\MigrationStep;
+
+class Migration1709633086AddOrderTransactionIdIndex extends MigrationStep
+{
+    public function getCreationTimestamp(): int
+    {
+        return 1_709_633_086;
+    }
+
+    public function update(Connection $connection): void
+    {
+        // add index for order-transaction-id
+        $sql = 'ALTER TABLE `payone_payment_order_transaction_data` ADD INDEX(`order_transaction_id`);';
+
+        $connection->executeStatement($sql);
+    }
+
+    public function updateDestructive(Connection $connection): void
+    {
+        // drop index for order-transaction-id
+        $sql = 'ALTER TABLE `payone_payment_order_transaction_data` DROP INDEX `order_transaction_id`;';
+
+        $connection->executeStatement($sql);
+    }
+}