Store timestamps in UTC and print in localtime

src/ddns_service/cleanup.py

@@ -17,7 +17,7 @@ def cleanup_expired(app):
     Returns:
         Number of expired hostnames processed.
     """
-    now = datetime.now()
+    now = datetime.now(datetime.timezone.utc)
     expired_count = 0
 
     for hostname in Hostname.select().join(User).where(