feat(110): statistics summary

Phase 110 complete:
- add Statistics -> Podsumowanie page
- add monthly order count and value charts per integration plus total
- use Chart.js with table fallback and 04-2026 default history start
- update PAUL and DOCS technical documentation

routes/web.php

@@ -442,6 +442,7 @@ return static function (Application $app): void {
     $router->get('/users', static fn (Request $request): Response => Response::redirect('/settings/users'), [$authMiddleware]);
     $router->get('/orders', static fn (Request $request): Response => Response::redirect('/orders/list'), [$authMiddleware]);
     $router->get('/orders/list', [$ordersController, 'index'], [$authMiddleware]);
+    $router->get('/statistics/summary', [$ordersStatisticsController, 'summary'], [$authMiddleware]);
     $router->get('/statistics/orders', [$ordersStatisticsController, 'index'], [$authMiddleware]);
     $router->get('/orders/{id}', [$ordersController, 'show'], [$authMiddleware]);
     $router->post('/orders/{id}/status', [$ordersController, 'updateStatus'], [$authMiddleware]);