chore: update deploy log for 21:30 UTC cron [skip ci]

Author: actions-user

data/deploy_log.jsonl

@@ -344,3 +344,4 @@
 {"date": "2026-06-25", "status": "success"}
 {"date": "2026-06-26", "status": "success"}
 {"date": "2026-06-27", "status": "success"}
+{"date": "2026-06-28", "status": "success"}