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feat: add LRU validation cache with OpenTelemetry metrics - #1936

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nissessenap wants to merge 13 commits into

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nissessenap:metrics

Draft

feat: add LRU validation cache with OpenTelemetry metrics#1936
nissessenap wants to merge 13 commits into
sigstore:mainfrom
nissessenap:metrics

Commits on Feb 16, 2026
- test: add LRU cache unit and integration tests (TDD Red)
  
  nissessenap
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  bcf8d3a
- feat: implement LRU+TTL cache for validation results
  
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  ccd8e3b
- feat: add opt-in CLI flags to enable validation result cache
  
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  481f870
- fix: defensive copy in cache Set, update copyright, extract test helper
  
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  8013c95
- feat: add cache hit/miss debug logging and e2e test resources
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  2d1dd26
- intial reserach metrics
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  03c8dfe
- chore(deps): bump knative.dev/pkg to latest for OTEL metrics
  
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  e027623
- make reserach decent....
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- plan
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- update plan
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- feat: add OpenTelemetry cache metrics for LRU validation cache
  
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  6a3a629
- refactor: move gauge registration to LRUCache instance to prevent callback accumulation
  
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  34f5e68
Commits on Feb 17, 2026
- refactor: move registerEntriesGauge to metrics.go for cohesion
  
  nissessenap
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  08e88b6