Production Deployment Checklist Before Launch ●       Secrets in vault ●       Rate limiting ●       Retry logic ●       Queueing ●       Structured logs ●       Health checks ●       DB pooling ●       CI/CD ●       Rollback strategy ●       Human approval console ●       Policy engine live ●       Audit logs enabled ●       Monitoring dashboards ●       Incident runbooks ●       MCP servers pinned to a known-good tool-definition hash, with re-approval required on change (New) ●       OAuth issuer validation enabled on every MCP client (New)