ver. 0.294: Remove all 12 legacy autoload/shop/ classes (~2363 lines)

Complete Domain-Driven Architecture migration:
- Phase 1-4: Transport, ProductSet, Coupon, Shop, Search, Basket,
  ProductCustomField, Category, ProductAttribute, Promotion
- Phase 5: Order (~562 lines) + Product (~952 lines)
- ~20 Product methods migrated to ProductRepository
- Apilo sync migrated to OrderAdminService
- Production hotfixes: stale Redis cache (prices 0.00), unqualified
  Product:: refs in LayoutEngine, object->array template conversion
- AttributeRepository::getAttributeValueById() Redis cache added

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

templates/shop-category/category.php

@@ -16,7 +16,7 @@ endif;
 
 if ( $this -> category['view_subcategories'] ):
   echo \Shared\Tpl\Tpl::view( 'shop-category/_partials/category-subcategory-tiles', [
-    'categories' => \shop\Category::get_subcategory_by_category( $this -> category['id'] ),
+    'categories' => ( new \Domain\Category\CategoryRepository( $GLOBALS['mdb'] ) )->subcategoriesLangCached( (int)$this -> category['id'] ),
   ] );
 
 endif;
@@ -25,7 +25,7 @@ endif;
 <div class="category-content" t='2'>
   <? if ( is_array( $this -> products ) ): foreach ( $this -> products as $product_id ):
     echo \Shared\Tpl\Tpl::view( 'shop-product/product-mini', [
-      'product' => \shop\Product::getFromCache( $product_id, $lang_id )
+      'product' => (new \Domain\Product\ProductRepository($GLOBALS['mdb']))->findCached( $product_id, $lang_id )
     ] );
   endforeach; endif;?>
 </div>