perf: optimize server-side analytics and notifications to resolve 32s transaction delay

- Added 5s timeout to GotifyNotificationService
- Reduced timeout to 2s in UmamiAnalyticsService
- Implemented non-blocking analytics tracking in layout using Next.js after() API

app/[locale]/layout.tsx

@@ -88,7 +88,10 @@ export default async function Layout(props: {
       });
     }
 
-    serverServices.analytics.trackPageview();
+    const { after } = await import('next/server');
+    after(() => {
+      serverServices.analytics.trackPageview();
+    });
   } catch {
     if (process.env.NODE_ENV !== 'production' || !process.env.CI) {
       console.warn(