User account deletion (#937)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/api/pulls/937
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

pkg/initialize/init.go

@@ -95,6 +95,8 @@ func FullInit() {
 	models.RegisterReminderCron()
 	models.RegisterOverdueReminderCron()
 	user.RegisterTokenCleanupCron()
+	user.RegisterDeletionNotificationCron()
+	models.RegisterUserDeletionCron()
 
 	// Start processing events
 	go func() {