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-basket/summary-view.php

@@ -4,7 +4,7 @@
   <div id="basket-summary" class="content">
     <? if ( is_array( $this -> basket ) and count( $this -> basket ) ):?>
       <? foreach ( $this -> basket as $position_hash => $position ):?>
-        <? $product = \shop\Product::getFromCache( $position[ 'product-id' ], $this -> lang_id );?>
+        <? $product = (new \Domain\Product\ProductRepository($GLOBALS['mdb']))->findCached( $position[ 'product-id' ], $this -> lang_id );?>
         <div class="basket-product">
           <div class="image">
             <? if ( file_exists( substr( $product[ 'images' ][ 0 ][ 'src' ], 1 ) ) ):?>
@@ -51,7 +51,7 @@
           <div class="prices">
             <div class="price">
               <?
-                $price_product = \shop\Product::calculate_basket_product_price((float)$product['price_brutto_promo'], (float)$product['price_brutto'], $this -> coupon, $position);
+                $price_product = \Domain\Basket\BasketCalculator::calculateBasketProductPrice((float)$product['price_brutto_promo'], (float)$product['price_brutto'], $this -> coupon, $position);
 
                 if ($price_product['price_new'])
                   echo \Shared\Helpers\Helpers::decimal($price_product['price_new']) . ' zł';