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-order/order-simple.php

@@ -39,7 +39,7 @@
   <div class="products">
     <? if ( is_array( $this -> order['products'] ) and count( $this -> order['products'] ) ):?>
       <? foreach ( $this -> order['products'] as $product ):?>
-        <? $product_tmp = \shop\Product::getFromCache( $product['product_id'], $lang['id'] );?>
+        <? $product_tmp = (new \Domain\Product\ProductRepository($GLOBALS['mdb']))->findCached( $product['product_id'], $lang['id'] );?>
         <div class="basket-product">
           <div class="image">
             <? if ( file_exists( substr( $product_tmp['images'][0]['src'], 1 ) ) ):?>
@@ -90,7 +90,7 @@
       <? endif;?>
       <? if ( $this -> coupon ):?>
         <div class="basket-summary">
-          Kod rabatowy: <span style="color: #cc0000;"><?= $this -> coupon -> name;?> - <?= $this -> coupon -> amount;?> <?= $this -> coupon -> type == 1 ? '%' : 'zł';?></span>
+          Kod rabatowy: <span style="color: #cc0000;"><?= $this -> coupon['name'];?> - <?= $this -> coupon['amount'];?> <?= $this -> coupon['type'] == 1 ? '%' : 'zł';?></span>
         </div>
       <? endif;?>
       <div class="basket-summary">