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>

autoload/Domain/Dictionaries/DictionariesRepository.php

@@ -256,19 +256,17 @@ class DictionariesRepository
 
     private function cacheFetch(string $key)
     {
-        if (!class_exists('\Cache') || !method_exists('\Cache', 'fetch')) {
-            return false;
+        $cacheHandler = new \Shared\Cache\CacheHandler();
+        $cached = $cacheHandler->get(self::CACHE_SUBDIR . ':' . $key);
+        if ($cached) {
+            return unserialize($cached);
         }
-
-        return \Cache::fetch($key, self::CACHE_SUBDIR);
+        return false;
     }
 
     private function cacheStore(string $key, string $value): void
     {
-        if (!class_exists('\Cache') || !method_exists('\Cache', 'store')) {
-            return;
-        }
-
-        \Cache::store($key, $value, self::CACHE_TTL, self::CACHE_SUBDIR);
+        $cacheHandler = new \Shared\Cache\CacheHandler();
+        $cacheHandler->set(self::CACHE_SUBDIR . ':' . $key, $value, self::CACHE_TTL);
     }
 }