Current behavior: RevenueDashboard shows MRR with a MoM growth % label. If MoM is -25%, it shows in red but there's no alert, no notification, no automated escalation. The notification system doesn't have a 'revenue_drop' event type. Expected behavior: If MoM growth drops below -10%, automatically: (1) surface a warning banner on the revenue tab; (2) send a notification via the notifications system; (3) potentially trigger the revenue discovery agent to find monetization improvements. File: N/A Recommendation: Add 'revenue_drop' and 'churn_spike' to NotificationEvent type. Wire the billing-crons.ts daily run to check MoM delta and trigger sendNotification if threshold exceeded.