ChatGPT's update to harden software and run db updates.

classes/MfaClock.php

@@ -0,0 +1,8 @@
+<?php
+
+final class MfaClock implements Psr\Clock\ClockInterface {
+
+    public function now(): DateTimeImmutable {
+        return new DateTimeImmutable('now', new DateTimeZone('UTC'));
+    }
+}