KM Koushik
e246d32ef9
The warning and limit-reached notification emails were being sent multiple times because of a race condition: concurrent workers could both read the Redis cooldown key as empty (GET), both send emails, then both set the key (SETEX). Replaced the non-atomic GET + SETEX pattern with a single atomic SET ... NX EX that claims the cooldown slot before any emails are sent. Also increased cooldown from 6 hours to 24 hours so each notification is sent at most once per day. https://claude.ai/code/session_01VBYXi5e64Vtq1cXWsfTYTw Co-authored-by: Claude <noreply@anthropic.com>