feat: consolidate stripe webhook handling into HandleStripeWebhook listener

app/Listeners/HandleStripeWebhook.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Listeners;
+
+use App\Models\User;
+use Illuminate\Support\Facades\Cache;
+use Laravel\Cashier\Events\WebhookReceived;
+
+final class HandleStripeWebhook
+{
+    public function handle(WebhookReceived $event): void
+    {
+        $type = $event->payload['type'] ?? null;
+        $stripeCustomerId = $event->payload['data']['object']['customer'] ?? null;
+
+        if ($stripeCustomerId === null) {
+            return;
+        }
+
+        $user = User::where('stripe_id', $stripeCustomerId)->first();
+
+        if ($user === null) {
+            return;
+        }
+
+        match ($type) {
+            'customer.subscription.created' => $this->bustPlanCache($user),
+            default => null,
+        };
+    }
+
+    private function bustPlanCache(User $user): void
+    {
+        Cache::tags(['plans'])->forget("plan_for_user_{$user->id}");
+    }
+}

app/Providers/AppServiceProvider.php

@@ -2,7 +2,7 @@
 
 namespace App\Providers;
 
-use App\Listeners\DowngradeUserOnSubscriptionDeleted;
+use App\Listeners\HandleStripeWebhook;
 use App\Services\ApiLogger;
 use App\Services\LlmPrediction\AnthropicPredictionProvider;
 use App\Services\LlmPrediction\GeminiPredictionProvider;
@@ -41,7 +41,7 @@ class AppServiceProvider extends ServiceProvider
     {
         $this->configureDefaults();
 
-        Event::listen(WebhookReceived::class, DowngradeUserOnSubscriptionDeleted::class);
+        Event::listen(WebhookReceived::class, HandleStripeWebhook::class);
     }
 
     /**