feat(service): đổi sản phẩm của dịch vụ, 2FA bắt buộc, đính kèm campaign mail, thu hồi IP

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

database/migrations/2026_10_27_000002_enable_two_factor_for_all_customers.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('customers', function ($table) {
+            $table->boolean('two_factor_enabled')->default(true)->change();
+        });
+
+        DB::table('customers')->where('two_factor_enabled', false)->update(['two_factor_enabled' => true]);
+    }
+
+    public function down(): void
+    {
+        Schema::table('customers', function ($table) {
+            $table->boolean('two_factor_enabled')->default(false)->change();
+        });
+    }
+};

database/migrations/2026_10_27_000003_add_attachments_to_mail_campaigns_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
+{
+    public function up(): void
+    {
+        Schema::table('mail_campaigns', function (Blueprint $table) {
+            $table->json('attachments')->nullable()->after('variables');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('mail_campaigns', function (Blueprint $table) {
+            $table->dropColumn('attachments');
+        });
+    }
+};