[feature](plugin) Add information_schema.plugins for kernel plugin metadata#65644

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Commits on Jul 15, 2026

[feature](plugin) Add information_schema.plugins for kernel plugin metadata
CalvinKirs
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[chore](format) fix clang-format in schema_plugins_scanner
CalvinKirs
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Commits on Jul 16, 2026

[fix](plugin) Address review findings for information_schema.plugins
CalvinKirs
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Commits on Jul 17, 2026

[fix](plugin) Harden plugin metadata snapshot and fix regression test grant
CalvinKirs
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