ver. 0.293: Code review fixes — 6 repositories, 16 fixes

- ArticleRepository: SQL injection fix (addslashes→parameterized), DRY refactor topArticles/newsListArticles
- AttributeRepository: dead class_exists('\S') blocking cache/temp clear
- CategoryRepository: dead class_exists('\S') blocking SEO link generation (critical)
- BannerRepository: parameterize $today in SQL + null guard on query()
- BasketCalculator: null guard checkProductQuantityInStock + optional DI params
- PromotionRepository: null guard on $basket (production fatal)
- OrderRepository/ShopBasketController/ajax.php: explicit DI in BasketCalculator callers

614 tests, 1821 assertions (+4 new)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

autoload/Domain/Attribute/AttributeRepository.php

@@ -938,14 +938,8 @@ class AttributeRepository
 
     private function clearTempAndCache(): void
     {
-        if (class_exists('\S')) {
-            if (method_exists('\S', 'delete_dir')) {
-                \Shared\Helpers\Helpers::delete_dir('../temp/');
-            }
-            if (method_exists('\S', 'delete_cache')) {
-                \Shared\Helpers\Helpers::delete_cache();
-            }
-        }
+        \Shared\Helpers\Helpers::delete_dir('../temp/');
+        \Shared\Helpers\Helpers::delete_cache();
     }
 
     private function normalizeDecimal(float $value, int $precision = 2): float