metrics: add prometheus-based libp2p and node-specific metrics - #17
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Enable libp2p's built-in Prometheus telemetry via PrometheusRegisterer (relaysvc, autonatv2, swarm, identify, holepunch, autorelay, eventbus) and wire a rcmgr StatsTraceReporter to expose libp2p_rcmgr_* (current streams/connections/memory/fds). Add an awl_bootstrap_* metrics package for the few things libp2p does not export: node info/uptime, DHT routing table size, node bandwidth and peerstore size. Expose everything at GET /metrics via echoprometheus. Move pprof endpoints from DevMode-only to a DisablePprof config flag (enabled by default).
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Enable libp2p's built-in Prometheus telemetry via PrometheusRegisterer (relaysvc, autonatv2, swarm, identify, holepunch, autorelay, eventbus) and wire a rcmgr StatsTraceReporter to expose libp2p_rcmgr_* (current streams/connections/memory/fds).
Add an awl_bootstrap_* metrics package for the few things libp2p does not export: node info/uptime, DHT routing table size, node bandwidth and peerstore size. Expose everything at GET /metrics via echoprometheus.
Move pprof endpoints from DevMode-only to a DisablePprof config flag (enabled by default).