feat: import user-defined physical optimizer rules over FFI#1557

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Commits on May 21, 2026

feat: user-defined OptimizerRule and AnalyzerRule from Python

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Commits on May 27, 2026

feat: import FFI physical optimizer rules; drop Python logical rules

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refactor: type physical_optimizer_rules with an Exportable Protocol

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docs: reference PhysicalOptimizerRuleExportable in SessionContext docstring

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docs: move FFI capsule detail to PhysicalOptimizerRuleExportable

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docs: drop redundant comment in SessionContext constructor

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docs: drop module-level doc comment from physical_optimizer

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refactor: import physical optimizer rule via from_pycapsule! macro

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docs: trim PhysicalOptimizerRuleExportable docstring

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Minor refactor
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