ver. 0.282: Banners frontend migration, Cache cleanup, Shared\Cache namespace

- Banners frontend: front\Views\Banners (new), BannerRepository +2 frontend methods,
  front\view\Site przepięty, usunięte front\factory\Banners i front\view\Banners
- Cache cleanup: eliminacja legacy class.Cache.php (file-based cache),
  13 metod front\factory przepiętych z \Cache::fetch/store na CacheHandler
- Shared\Cache namespace: CacheHandler i RedisConnection przeniesione do Shared\Cache\,
  60 odwołań CacheHandler i 12 odwołań RedisConnection przepiętych,
  usunięte backward-compat wrappery class.CacheHandler.php i class.RedisConnection.php
- Naprawione rozbieżności kluczy cache (random_products, category_name)

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

tests/bootstrap.php

@@ -59,7 +59,7 @@ if (!class_exists('S')) {
     }
 }
 
-if (!class_exists('RedisConnection')) {
+if (!class_exists('Shared\\Cache\\RedisConnection')) {
     class RedisConnection {
         private static $instance;
         public static function getInstance() {
@@ -68,6 +68,7 @@ if (!class_exists('RedisConnection')) {
         }
         public function getConnection() { return null; }
     }
+    class_alias('RedisConnection', 'Shared\\Cache\\RedisConnection');
 }
 
 if (!class_exists('Redis')) {
@@ -80,7 +81,7 @@ if (!class_exists('Redis')) {
     }
 }
 
-if (!class_exists('CacheHandler')) {
+if (!class_exists('Shared\\Cache\\CacheHandler')) {
     class CacheHandler {
         public function get($key) { return null; }
         public function set($key, $value, $ttl = 86400) {}
@@ -88,4 +89,5 @@ if (!class_exists('CacheHandler')) {
         public function delete($key) {}
         public function deletePattern($pattern) {}
     }
+    class_alias('CacheHandler', 'Shared\\Cache\\CacheHandler');
 }