feat: field observability for engine daemon and engine eval (--observe-fields)#149

Merged

mostafa merged 15 commits into

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feat/field-observer

May 25, 2026

Commits on May 25, 2026

refactor(eval): extract rule field collector into shared fields module
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feat(runtime): cache post-pipeline rule field set on RuntimeEngine
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feat(eval): add Event::field_keys for daemon field observability
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feat(runtime): add FieldObserver for opt-in field-key telemetry
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feat(daemon): wire --observe-fields flag and metrics into the engine task
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feat(daemon): expose /api/v1/fields, /unknown, /missing, and observer reset
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test(daemon): cover /api/v1/fields/* endpoints end-to-end
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docs: document /api/v1/fields/* and the field observer
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docs(readmes): surface field observer in workspace and crate READMEs
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docs(changelog): reference PR #149 instead of the roadmap item
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fix(runtime): drive Prometheus counters from lifetime totals
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perf+correctness: clean up the four review-deferred items
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feat(eval): mirror field observability to engine eval; relocate observer
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refactor(eval): centralize the coverage join + polish observe flags
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docs: sync CHANGELOG and READMEs with the rsigma-eval relocation
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