chore: better prometheus metrics#39475

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Copilot wants to merge 13 commits into

copilot/improve-metric-naming

Commits on Mar 12, 2026

add eventLoopUtilization to metrics
d-gubert
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add Prometheus best-practices metric duplicates (Histograms + _total counters)"

Copilot
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d-gubert
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remove user_agent and version labels from rocketchatRestApiSeconds histogram

Copilot
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d-gubert
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make histogram non-optional in metricsMiddleware

Copilot
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d-gubert
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extract rate limit labels to variable in rateLimiter.js

Copilot
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d-gubert
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move metrics middleware first and tracer second in api.ts middleware chain

Copilot
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d-gubert
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move metrics middleware to end of chain in integrations api

Copilot
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d-gubert
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add response size histogram and active requests gauge to metrics middleware

Copilot
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d-gubert
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reorder integrations api middleware chain to metrics -> tracer -> logger

Copilot
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d-gubert
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fix metrics.spec.ts: add required histogram, responseSizeHistogram, activeRequestsGauge mocks

Copilot
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d-gubert
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rename summary/histogram params to endpointTimeSummary/endpointTimeHistogram in metricsMiddleware

Copilot
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d-gubert
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refactor: elu metric name
d-gubert
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update bucket values for latency and response size histograms

Copilot
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d-gubert
committed