feat: add domain registration form and email notifications

- Create a new Blade view for domain registration (`registrant-tochuc.blade.php`) to capture organization and manager details.
- Implement email templates for new domain orders for both admin (`domain-order-new.blade.php`) and customers (`domain-order-received.blade.php`).
- Add CSV exports for client and domain data.
- Introduce tests for customer mass assignment, password reset, login throttling, and permission gating.
- Ensure service renewals use current pricing and validate ownership for virtual machines.
- Validate mass assignment behavior in service model.

app/Models/ExportJob.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ExportJob extends Model
+{
+    protected $table = 'export_jobs';
+
+    protected $guarded = [];
+
+    protected $casts = [
+        'filters' => 'array',
+        'fields' => 'array',
+        'completed_at' => 'datetime',
+    ];
+
+    public function creator()
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+}