Add username and password fields to VirtualMachines model and database migration; update related email templates to use config for frontend URL

database/migrations/2026_07_14_000001_add_credentials_to_virtual_machines_table.php

@@ -0,0 +1,23 @@
+<?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('virtual_machines', function (Blueprint $table) {
+            $table->string('username')->nullable()->after('ip');
+            $table->string('password')->nullable()->after('username');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('virtual_machines', function (Blueprint $table) {
+            $table->dropColumn(['username', 'password']);
+        });
+    }
+};