feat(hardened): Observability and metrics for Tier 4 services - #406
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Add comprehensive Grafana monitoring dashboards for session-context-worker (19 panels) and messaging-gateway (17 panels). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add prometheus-client instrumentation to: - session-context-worker (port 8100): Convert JSON /metrics to Prometheus format * Counter: messages_received_total (by subject) * Counter: messages_processed_total (by context_type) * Counter: messages_failed_total (by error_type) * Counter: kb_upserts_published_total (by namespace) * Histogram: processing_duration_seconds (by context_type) - messaging-gateway (port 8101): Add comprehensive metrics * Counter: messages_sent_total (by platform, status) * Counter: nats_messages_received_total (by subject) * Counter: api_requests_total (by endpoint, status) * Histogram: request_duration_seconds (by endpoint) Update prometheus.yml with scrape targets for both services. All /metrics endpoints now return generate_latest() in Prometheus text format instead of JSON. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Fixes CRITICAL bugs in PR #361 - missing Prometheus metric definitions that would cause NameError at runtime. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Superseded by PR #433 (observability features now in merged branch) |
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Summary: Grafana dashboards and Prometheus metrics for Tier 4 services
Changes:
Test Plan: Metrics display correctly in Grafana dashboards