Refs #2
- /metrics served on a dedicated port (KNOX_METRICS_ADDR, default
localhost:8932) via prometheus/client_golang, with Go runtime +
process collectors
- DB-derived gauges refreshed per scrape: observations by source,
last-24h observations, entries, projects, sessions, pending
reflections, threads by status, peers, observations by origin node,
knowledge vector (max hcl per node)
- live gossip counters (pulls/pushes, observations pulled/pushed,
errors) incremented during the anti-entropy sweep; Run accepts an
optional metrics handle (nil for one-shot CLI)
- knox_node_info{node_id,name} for scrape identification
- internal/metrics package + db MetricsSnapshot; tests for snapshot,
scrape output, and counter increments
david