add missing roleGuards

app/accounting/api/engine/department_stats.php

@@ -1,8 +1,11 @@
 <?php
 session_start();
 require_once '../../../assets/utils/db_auth.php';
+require_once '../../../assets/utils/classes/UsageGuard.php';
 require_once '../../../assets/utils/classes_ac/DepartmentManager.php';
 
+(new UsageGuard($pdo1, $company_id, $packages))->assertFeatureAccessible('dashboard');
+
 $dept   = new DepartmentManager($pdo2, $company_id);
 $stats  = $dept->getStats();
 $answer = array_merge(['success' => 1], $stats);