chore: improve unit test coverage#173

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zhaohaidao wants to merge 8 commits intoapache:mainfrom

Commits on Jan 17, 2026

chore: consolidate utc changes
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Commits on Jan 20, 2026

add cpp bindings ut
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Merge remote-tracking branch 'origin/main' into utc
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address fmt issues
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Commits on Jan 21, 2026

Merge remote-tracking branch 'origin/main' into utc
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fix clippy failures
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Commits on Jan 23, 2026

Merge remote-tracking branch 'origin/main' into utc
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fix panic risk
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