Add reminders for overdue tasks (#832)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/832
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

pkg/initialize/init.go

@@ -93,6 +93,7 @@ func FullInit() {
 	// Start the cron
 	cron.Init()
 	models.RegisterReminderCron()
+	models.RegisterOverdueReminderCron()
 
 	// Start processing events
 	go func() {