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These changes were developed on the phase-10 branch but belong to content this branch and its upstreams introduced. Carrying them on phase-10 made its PR diff report churn in files phase-10 does not own, and left each PR claiming a scope that did not match its contents. Moved here from phase-10 (identical content, no functional change): - Dashboards: all 14 existing boards plus the new log-derived-insights board. - Docs: telemetry-runbook.md (minus the workload/benchmark sections, which describe phase-10 tooling) and the new telemetry-glossary.md. - Grafana Cloud + Alloy export path: collector config, compose override, the two .env examples and alloy/config.alloy. - Local stack: otel-collector-config.yaml gains sub-millisecond and second-scale spanmetrics buckets, pins unit=ms, and promotes close_time_correct; integration-test.sh and TESTING.md follow. - Node configs: exported_instance -> service_instance_id in comments; the mainnet sample now logs at warning to bound log volume. - Metrics code: Telemetry.cpp builds the metrics pipeline in the constructor via initMetrics() so the global MeterProvider is published before any subsystem creates a beast::insight instrument, and the histogram view keeps each instrument's own name instead of collapsing them under one series. MetricsRegistry gains a last_close_time gauge and skips negative job-queue durations. OTelCollector drops an unused accessor. - Naming CI: xrpl_work_item joins EXTERNAL_INFRA_LABELS and Rule E accepts the dotted perf-iac resource-attribute form. This must travel with the dashboards and runbook that reference those labels, or the rules fail. - Doxygen input glob no longer recurses dot-directories. Sections describing phase-10 tooling stay on phase-10 and keep their "Future Enhancement" / "Planned, not yet implemented" markers here; phase-10 removes those markers when it lands the tooling.