feat(metrics): instrument extension implementations with core/metrics#112
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sbalabanov
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Mar 4, 2026
Add metrics.Begin/Complete lifecycle tracking to all uninstrumented extension implementations: counter/mysql, storage/mysql (all 6 stores), scorer/heuristic, and scorer/composite. Each constructor now accepts a tally.Scope and every interface method emits called/succeeded/failed counters plus latency timers.
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Summary
metrics.Begin/Completelifecycle tracking to all uninstrumented extension implementations:counter/mysql,storage/mysql(all 6 stores),scorer/heuristic, andscorer/compositetally.Scopeand every interface method emits called/succeeded/failed counters plus latency timers with error classification tagsTest plan
make test— 24/24 passing)make build)make gazelleconfirms BUILD files are in synctally.NoopScope(Docker-based, run in CI)