feat(cache): add Prometheus metrics for cache hit/miss/error observability#158

Merged

appleboy merged 6 commits intomainfrom

feat/cache-metrics

Apr 5, 2026

Commits on Apr 4, 2026

feat(cache): add Prometheus metrics for cache hit/miss/error observability

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refactor(cache): simplify instrumented cache after review

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style(cache): remove redundant godoc on interface methods

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fix(cache): use atomic.Bool for fetchCalled and fix miss/error counting

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fix(cache): only count hit/miss on successful GetWithFetch return

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fix(cache): count miss when fetchFunc called regardless of error

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