feat(catalog): add sales_end_at field to catalog items and implement sale logic

feat(event): include catalog items in event resource and update event service
test(seeder): add FiestaTradicionArrufoSeeder for event and catalog item setup
config: set event timezone for local event dates

database/migrations/2026_09_18_000900_add_sales_end_at_to_catalog_items.php

@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('catalog_items', function (Blueprint $table): void {
+            $table->timestamp('sales_end_at')->nullable()->after('precio');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('catalog_items', function (Blueprint $table): void {
+            $table->dropColumn('sales_end_at');
+        });
+    }
+};