- Add 4 Prometheus exporters: nginx (9113), redis (9121), postgres (9187), node (9100) - Create 8 alerting rules in monitoring/prometheus/alerts.yml - Update prometheus.yml with all scrape targets + rule_files - WS connection rate limiting: max 5/IP/60s (Redis INCR) - Admin login rate limiting: max 5/IP/5min (Redis INCR) - 3 backup scripts: daily to R2 (14d), weekly full (8w), verify with restore test - docs/incident-runbook.md with 5-tier triage + escalation - Update CD workflow: full prometheus config + alerts seeding
