feat: consolidate stripe webhook handling into HandleStripeWebhook listener

tests/Feature/Payments/HandleStripeWebhookTest.php

@@ -0,0 +1,30 @@
+<?php
+
+use App\Listeners\HandleStripeWebhook;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Cache;
+use Laravel\Cashier\Events\WebhookReceived;
+
+uses(RefreshDatabase::class);
+
+it('busts the plan cache on customer.subscription.created', function (): void {
+    $user = User::factory()->create(['stripe_id' => 'cus_created_1']);
+    Cache::tags(['plans'])->put("plan_for_user_{$user->id}", 'stale', 3600);
+
+    (new HandleStripeWebhook)->handle(new WebhookReceived([
+        'type' => 'customer.subscription.created',
+        'data' => ['object' => ['customer' => 'cus_created_1']],
+    ]));
+
+    expect(Cache::tags(['plans'])->get("plan_for_user_{$user->id}"))->toBeNull();
+});
+
+it('ignores subscription.created when the user is not found', function (): void {
+    (new HandleStripeWebhook)->handle(new WebhookReceived([
+        'type' => 'customer.subscription.created',
+        'data' => ['object' => ['customer' => 'cus_unknown']],
+    ]));
+
+    expect(true)->toBeTrue();
+});