security: faza 1 - usuniecie debug logu tpay, naprawa SQL i usun rb.php

- ShopOrderController: usunieto file_put_contents do tpay.txt (ujawnial dane platnicze)
- ShopOrderController: hardcoded sekret HotPay przeniesiony do stałej HOTPAY_HASH_SEED
- IntegrationsRepository: zastapiono raw SQL query('SELECT * FROM $table') metodą Medoo select()
- index.php + admin/index.php: usunieto RedBeanPHP (rb.php) - biblioteka byla ladowana ale nieuzywana
- libraries/rb.php: usunieto plik (536 KB, zero uzyc w kodzie aplikacji)
- Testy IntegrationsRepository zaktualizowane do nowego API (select zamiast query)

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

autoload/Domain/Integrations/IntegrationsRepository.php

@@ -28,10 +28,9 @@ class IntegrationsRepository
     public function getSettings( string $provider ): array
     {
         $table = $this->settingsTable( $provider );
-        $stmt = $this->db->query( "SELECT * FROM $table" );
-        $results = $stmt ? $stmt->fetchAll( \PDO::FETCH_ASSOC ) : [];
+        $rows = $this->db->select( $table, [ 'name', 'value' ] );
         $settings = [];
-        foreach ( $results as $row )
+        foreach ( $rows ?: [] as $row )
             $settings[$row['name']] = $row['value'];
 
         return $settings;