feat(previews): add preview domain management and DNS status tracking

database/migrations/2026_08_28_193100_add_domain_dns_statuses_to_application_previews_table.php

@@ -0,0 +1,28 @@
+<?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::table('application_previews', function (Blueprint $table) {
+            $table->json('domain_dns_statuses')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('application_previews', function (Blueprint $table) {
+            $table->dropColumn('domain_dns_statuses');
+        });
+    }
+};