feat: improve engine caching and fix bugs#3932

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zewenli98 wants to merge 8 commits intomainfrom

improve_engine_caching

Commits on Nov 24, 2025

Commits on Dec 1, 2025

fix comments
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Commits on Dec 4, 2025

resolve CUDA OOM issue in tests
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Commits on Dec 5, 2025

Commits on Dec 6, 2025

fix comments
zewenli98
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Commits on Dec 12, 2025

fix comments and add warnings
zewenli98
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