Observability

Observability Feature Notes will cover worker logs, metrics, health/readiness, retry metrics, dashboards, alerts, and future OpenTelemetry/Loki/Grafana work.

Current status:

• Worker metrics, structured logs, health, and readiness are implemented.
• Grafana dashboards, OTel Collector wiring, Loki routing, alerting rules, and exact JetStream consumer lag remain planned.

Add a dedicated Feature Note when the observability milestone needs client-side acceptance validation.