added support for legacy tickets

Modules/Helpdesk/Models/LegacyComment.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Modules\Helpdesk\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+final class LegacyComment extends Model
+{
+    protected $table = 'helpdesk_legacy_comments';
+    protected $guarded = [];
+    protected $casts = ['legacy_created_at' => 'datetime', 'legacy_updated_at' => 'datetime'];
+}