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>

autoload/Domain/Attribute/AttributeRepository.php

@@ -484,7 +484,16 @@ class AttributeRepository
         }
 
         $languageId = $langId !== null && trim($langId) !== '' ? trim($langId) : $this->defaultLanguageId();
-        return (string)$this->db->get(
+
+        $cacheHandler = new \Shared\Cache\CacheHandler();
+        $cacheKey = "AttributeRepository::getAttributeValueById:{$valueId}:{$languageId}";
+        $cached = $cacheHandler->get($cacheKey);
+
+        if ($cached !== false && $cached !== null) {
+            return (string)unserialize($cached);
+        }
+
+        $name = (string)$this->db->get(
             'pp_shop_attributes_values_langs',
             'name',
             [
@@ -494,6 +503,10 @@ class AttributeRepository
                 ],
             ]
         );
+
+        $cacheHandler->set($cacheKey, $name);
+
+        return $name;
     }
 
     /**
@@ -939,4 +952,66 @@ class AttributeRepository
     {
         return round($value, $precision);
     }
+
+    public function isValueDefault(int $valueId)
+    {
+        if ($valueId <= 0) {
+            return null;
+        }
+
+        $cacheHandler = new \Shared\Cache\CacheHandler();
+        $cacheKey = "attr_value_default:{$valueId}";
+        $cached = $cacheHandler->get($cacheKey);
+
+        if ($cached) {
+            return unserialize($cached);
+        }
+
+        $isDefault = $this->db->get('pp_shop_attributes_values', 'is_default', ['id' => $valueId]);
+        $cacheHandler->set($cacheKey, $isDefault);
+
+        return $isDefault;
+    }
+
+    public function getAttributeOrder(int $attributeId)
+    {
+        if ($attributeId <= 0) {
+            return null;
+        }
+
+        $cacheHandler = new \Shared\Cache\CacheHandler();
+        $cacheKey = "attr_order:{$attributeId}";
+        $cached = $cacheHandler->get($cacheKey);
+
+        if ($cached) {
+            return unserialize($cached);
+        }
+
+        $order = $this->db->get('pp_shop_attributes', 'o', ['id' => $attributeId]);
+        $cacheHandler->set($cacheKey, $order);
+
+        return $order;
+    }
+
+    public function getAttributeNameByValue(int $valueId, string $langId)
+    {
+        if ($valueId <= 0) {
+            return null;
+        }
+
+        $stmt = $this->db->query(
+            'SELECT name FROM pp_shop_attributes_langs AS psal '
+            . 'INNER JOIN pp_shop_attributes_values AS psav ON psal.attribute_id = psav.attribute_id '
+            . 'WHERE psav.id = :value_id AND lang_id = :lang_id',
+            [':value_id' => $valueId, ':lang_id' => $langId]
+        );
+
+        if (!$stmt) {
+            return null;
+        }
+
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        return is_array($row) ? ($row['name'] ?? null) : null;
+    }
 }