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-details.php

@@ -6,7 +6,7 @@
   <?= \Shared\Tpl\Tpl::view( 'shop-order/order-simple', [
         'order' => $this -> order,
         'coupon' => $this -> coupon,
-        'statuses' => \shop\Order::order_statuses()
+        'statuses' => ( new \Domain\Order\OrderRepository( $GLOBALS['mdb'] ) )->orderStatuses()
       ] );?>
   <? if ( $this -> order['status'] == 0 or $this -> order['status'] == 2 ):?>
     <div class="order-bottom">