feat(tenant): add checkout editing policy

database/migrations/2026_08_20_000000_add_checkout_editing_policy_to_tenants.php

@@ -0,0 +1,24 @@
+<?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('tenants', function (Blueprint $table): void {
+            $table->string('checkout_editing_policy')
+                ->default('disabled')
+                ->after('cart_editing_policy');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('tenants', function (Blueprint $table): void {
+            $table->dropColumn('checkout_editing_policy');
+        });
+    }
+};