added alert flag and variation flag

public/userarea/scadenzario/cron/send_notifications.php

@@ -57,12 +57,13 @@ $stmt = $pdo->query("
     LEFT JOIN scad_subjects s ON s.id = d.subject_id
     LEFT JOIN scad_functions f ON f.id = d.function_id
     WHERE d.status = 'active'
+      AND d.attiva_alert = 1
       AND d.due_date <= DATE_ADD(CURDATE(), INTERVAL d.notification_days DAY)
 ");
 $deadlines = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
 if (empty($deadlines)) {
-    echo date('Y-m-d H:i:s') . " — Nessuna scadenza da notificare.\n";
+    echo date('Y-m-d H:i:s') . " — Nessuna scadenza da notificare (alert attivo).\n";
     exit(0);
 }