docs(testing): explain reading Sonar/PIT as data — coverage and duplication triage#141
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…cation triage Document the interpretation framework discussed while clearing the Sonar findings: an uncovered line is one of missing-test / dead-code / defensive-by-contract, coverage cannot tell them apart but mutation testing can, and flagged duplication is usually real but sometimes the deliberate price of the hot-loop vectorisation rule (BitpackedEncodingDecoder). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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docs/testing.mdcapturing the interpretation framework we used while clearing the Sonar findings onmain:BitpackedEncodingDecoderper-row schedule), but sometimes it is the price of the hot-loop vectorisation rule and the invariant wins.Pure docs; no code change.
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