Refactor event forwarding and improve test coverage

- Updated event forwarding to include request headers
- Refactored validation to improve error handling
- Fixed issue with missing headers in HTTP request
- Improved test cases for event forwarding and caching
- Ensured proper handling of JSON payloads
- Fixed Plausible API URL configuration in tests

routes/api.php

@@ -1,13 +1,18 @@
 <?php
 
 use Illuminate\Http\Request;
-use Illuminate\Support\Facades\Concurrency;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\Route;
 use Illuminate\Support\Facades\Validator;
 
 Route::post('api/event', function (Request $request) {
-    $validator = Validator::make($request->all(), [
+    $data = json_decode($request->getContent(), true);
+
+    if (json_last_error() !== JSON_ERROR_NONE) {
+        return response()->json(['error' => 'Invalid JSON format'], 422);
+    }
+
+    $validator = Validator::make($data, [
         'n' => 'required|string',
         'u' => 'required|url',
         'd' => 'required|string',
@@ -20,7 +25,11 @@ Route::post('api/event', function (Request $request) {
         return response()->json(['status' => 'error', 'errors' => $validator->errors()], 422);
     }
 
-    Concurrency::defer(fn () => Http::post(config('plausible-proxy.domain').'/api/event', $request->all()));
+    $headers = collect($request->headers->all())
+        ->mapWithKeys(fn($value, $key) => [$key => is_array($value) ? implode(', ', $value) : $value])
+        ->all();
+
+    Http::withHeaders($headers)->post(config('plausible-proxy.domain').'/api/event', $data);
 
     return response()->json(['status' => 'queued']);
 });