fix: preserve rowid across data branch fallback changes#24174

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gouhongshen wants to merge 12 commits intomatrixorigin:mainfrom

gouhongshen:codex/fix-data-branch-gc-diff

Commits on Apr 24, 2026

fix: materialize snapshot fallback and add GC diff regression

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fix: preserve rowid in data branch changes

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fix: restore data branch hashmap build

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test: align no-lca hashdiff stubs

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fix: guard blockio commit-ts reads

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fix: use snapshot ts in materialized fallback

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test: address review feedback on PR 24174

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test: gofmt fixes

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test(data-branch): cover materializedSnapshotDataSource accessors

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test(data-branch): lock CDC batch schema invariants when retainRowID=false

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fix(snapshot-scan): attach tombstones before splitting shards

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style: gofmt fixes for new test files

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