units,lesson as standalone

cron/client.cron.js

@@ -21,6 +21,7 @@
 const userNotifications  = require('./jobs/user_notifications.cron');
 const issueCertificates  = require('./jobs/issue_certificates.cron');
 const expireUserTiers    = require('./jobs/expire_user_tiers.cron');
+const taskDueSoon        = require('./jobs/task_due_soon.cron');
 const { startSettingsBackedJobs } = require('./cronRegistry.util');
 
 // ─── Registry — add future client-side cron jobs here ────────────────────────
@@ -28,6 +29,7 @@ const jobs = [
     userNotifications,
     issueCertificates,
     expireUserTiers,
+    taskDueSoon,
 ];
 
 // ─── Boot all registered client-side jobs ─────────────────────────────────────