Fix quotations leaking empty-string match lowering into AST (#19873)#19923

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feature/pattern-match-empty-string-quotations

Commits on Jun 5, 2026

Move empty-string match optimization to Optimizer so quotations stay clean

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Lock in IL trade-offs from rubber-duck review; tighten optimizer guard

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Polish quotation rendering test suite

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Commits on Jun 8, 2026

Tighten test comments; collapse no-leak quotation tests to Theory

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Commits on Jun 9, 2026

Commits on Jun 10, 2026