<!-- etc/di.xml - Contextual Dependency Injection & Virtual Types -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <!-- Binding Interface to Concrete Implementation -->
    <preference for="VendorModuleApiOrderRepositoryInterface" 
                type="VendorModuleModelOrderRepository" />

    <!-- Proxy Lazy-Loading for Heavy Services -->
    <type name="VendorModuleModelCheckoutHandler">
        <arguments>
            <argument name="paymentGateway" xsi:type="object">VendorPaymentModelGatewayProxy</argument>
        </arguments>
    </type>
</config>

<?php
declare(strict_types=1);

namespace VendorModulePlugin;

use MagentoCatalogApiProductRepositoryInterface;
use MagentoCatalogApiDataProductInterface;

class ProductPriceAdjustmentPlugin
{
    /**
     * Intercepting Product Save to inject dynamic currency normalization
     */
    public function beforeSave(
        ProductRepositoryInterface $subject,
        ProductInterface $product,
        bool $saveOptions = false
    ): array {
        if ($product->getPrice() < 0) {
            $product->setPrice(0.00);
        }
        return [$product, $saveOptions];
    }
}

<!-- etc/db_schema.xml - Declarative Database Definition -->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
    <table name="vendor_custom_order_log" resource="default" engine="innodb" comment="Custom Enterprise Audit Log">
        <column xsi:type="int" name="log_id" unsigned="true" nullable="false" identity="true" comment="Primary Key"/>
        <column xsi:type="varchar" name="order_increment_id" nullable="false" length="32" comment="Order ID"/>
        <column xsi:type="decimal" name="total_amount" scale="4" precision="12" nullable="false" comment="Order Amount"/>
        <column xsi:type="timestamp" name="created_at" on_update="false" nullable="false" default="CURRENT_TIMESTAMP" comment="Timestamp"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">
            <column name="log_id"/>
        </constraint>
    </table>
</schema>