feat: stabilize cache codec with a versioned envelope#7163

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wjones127 wants to merge 8 commits into

lance-format:mainfrom

wjones127:feat/stable-cache-codec-envelope

Commits on Jun 11, 2026

feat: stabilize cache codec with a versioned envelope

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feat: migrate remaining cache codecs to proto headers + aligned IPC

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refactor: drop unused CacheCodec helpers, tidy codec docs

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refactor: move cache protos out of the format spec into lance-index

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refactor(cache): surface miss reasons and tighten codec surface

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feat(cache): preserve RabitQ query_estimator across cache reload

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refactor(cache): polish codec — fix stale unwrap, dedupe padding, test variant miss

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docs(cache): fix broken intra-doc link to CacheCodecImpl::serialize

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