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-search/products.php

@@ -7,7 +7,7 @@
 <div class="search-content">
   <? 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>