refactor: use DTO and terminate middleware for better performance

- Add PageviewData readonly DTO class for type safety
- Update AnalyticsClient to accept PageviewData instead of array
- Move analytics sending to terminate() method (runs after response sent)
- Update all tests for new DTO pattern

tests/Feature/AnalyticsMiddlewareTest.php

@@ -25,9 +25,13 @@ function createMiddleware(): AnalyticsMiddleware
 
 function handleRequest(AnalyticsMiddleware $middleware, Request $request): Response
 {
-    return $middleware->handle($request, function ($req) {
+    $response = $middleware->handle($request, function ($req) {
         return new Response('Test content');
     });
+
+    $middleware->terminate($request, $response);
+
+    return $response;
 }
 
 it('captures analytics data for web requests', function () {
@@ -45,7 +49,7 @@ it('captures analytics data for web requests', function () {
         $data = $request->data();
 
         return $request->url() === 'https://analytics.mattitja.cloud/api/send' &&
-               $data['k'] === 'test-site-key' &&
+               $data['k'] === 'testsiteky' &&
                $data['u'] === 'https://example.com/test' &&
                $data['r'] === 'https://google.com' &&
                $data['ip'] === '192.168.1.1' &&