- Replace Prometheus with VictoriaMetrics (2-year retention)
- Add DuckDB analytics module for business KPIs (unlimited retention)
- Add master overview dashboard combining all metrics
- Add business metrics dashboard for user growth tracking
- Add backup script for VictoriaMetrics snapshots and DuckDB
- Add ADR documentation for monitoring stack decision
Analytics API endpoints:
- GET /api/v1/analytics/health - Service health
- GET /api/v1/analytics/latest - Latest metrics snapshot
- GET /api/v1/analytics/growth - User growth over time
- GET /api/v1/analytics/monthly - Monthly aggregates
- POST /api/v1/analytics/snapshot - Manual snapshot trigger
