Add guest push notifications and queue alerts

database/factories/PushSubscriptionFactory.php

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+<?php
+
+namespace Database\Factories;
+
+use App\Models\Event;
+use App\Models\PushSubscription;
+use App\Models\Tenant;
+use Illuminate\Database\Eloquent\Factories\Factory;
+use Illuminate\Support\Str;
+
+class PushSubscriptionFactory extends Factory
+{
+    protected $model = PushSubscription::class;
+
+    public function definition(): array
+    {
+        $endpoint = $this->faker->url();
+
+        return [
+            'tenant_id' => Tenant::factory(),
+            'event_id' => Event::factory(),
+            'guest_identifier' => Str::slug($this->faker->firstName()),
+            'device_id' => (string) Str::uuid(),
+            'endpoint' => $endpoint,
+            'endpoint_hash' => hash('sha256', $endpoint),
+            'public_key' => base64_encode(random_bytes(32)),
+            'auth_token' => base64_encode(random_bytes(16)),
+            'content_encoding' => 'aes128gcm',
+            'status' => 'active',
+            'language' => 'de',
+            'user_agent' => 'Mozilla/5.0',
+        ];
+    }
+
+    public function revoked(): static
+    {
+        return $this->state([
+            'status' => 'revoked',
+        ]);
+    }
+}

database/migrations/2025_11_12_201445_create_push_subscriptions_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('push_subscriptions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->cascadeOnDelete();
+            $table->foreignId('event_id')->constrained()->cascadeOnDelete();
+            $table->string('guest_identifier', 120)->nullable();
+            $table->string('device_id', 120);
+            $table->string('endpoint', 500)->unique();
+            $table->string('endpoint_hash', 128)->index();
+            $table->string('public_key', 255);
+            $table->string('auth_token', 255);
+            $table->string('content_encoding', 32)->default('aes128gcm');
+            $table->string('status', 32)->default('active');
+            $table->timestamp('expires_at')->nullable();
+            $table->timestamp('last_seen_at')->nullable();
+            $table->timestamp('last_notified_at')->nullable();
+            $table->timestamp('last_failed_at')->nullable();
+            $table->unsignedSmallInteger('failure_count')->default(0);
+            $table->string('language', 12)->nullable();
+            $table->string('user_agent', 255)->nullable();
+            $table->json('meta')->nullable();
+            $table->timestamps();
+
+            $table->index(['event_id', 'status']);
+            $table->index(['event_id', 'guest_identifier']);
+            $table->index(['event_id', 'device_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('push_subscriptions');
+    }
+};