[refactor](catalog) Unify external metadata cache framework - #66633

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924060929 wants to merge 10 commits into

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924060929:prototype-scoped-metacache-ut

Commits on Aug 26, 2026

[refactor](fe) Add scoped metadata cache prototype
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4803701
[improvement](fe) Reduce scoped metadata cache overhead
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899e7bf
[improvement](fe) Reduce scoped metadata load overhead
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dc81bc2
[improvement](fe) Scale scoped metadata cache publication
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fe8dae5
[refactor](fe) Unify external metadata cache framework
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[refactor](fe) Clarify external metadata cache ownership
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[fix](fe) Preserve scoped cache publication ordering
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d305211
[fix](fe) Retire unpublished metadata cache values
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[fix](fe) Preserve metadata cache value ownership
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5c0c857

Commits on Aug 27, 2026

[fix](fe) Publish metadata IDs with cache objects
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f04e5f3