ACP2E-443 Configurable product remains out of stock even after full reindex if it's in stock and is_salable is set to 0

- Fixed CR

Author: Anna Bukatar

app/code/Magento/Catalog/Model/ResourceModel/GetProductTypeById.php

@@ -4,14 +4,14 @@
  * See COPYING.txt for license details.
  */
 
+declare (strict_types=1);
 namespace Magento\Catalog\Model\ResourceModel;
 
 use Magento\Catalog\Api\Data\ProductInterface;
 use Magento\Framework\App\ResourceConnection;
 
 /**
  * Get product type ID by product ID.
- *
  */
 class GetProductTypeById
 {
@@ -35,7 +35,7 @@ public function __construct(
      * @param int $productId
      * @return string
      */
-    public function execute(int $productId)
+    public function execute(int $productId): string
     {
         $connection = $this->resource->getConnection();
         $productTable = $this->resource->getTableName('catalog_product_entity');

app/code/Magento/ConfigurableProduct/Model/Plugin/UpdateStockChangedAuto.php

@@ -4,13 +4,17 @@
  * See COPYING.txt for license details.
  */
 
+declare (strict_types=1);
 namespace Magento\ConfigurableProduct\Model\Plugin;
 
 use Magento\Catalog\Model\ResourceModel\GetProductTypeById;
 use Magento\CatalogInventory\Model\ResourceModel\Stock\Item as ItemResourceModel;
 use Magento\Framework\Model\AbstractModel as StockItem;
 use Magento\ConfigurableProduct\Model\Product\Type\Configurable;
 
+/**
+ * Updates stock_status_changed_auto setting for configurable product when it was saved manually
+ */
 class UpdateStockChangedAuto
 {
     /**