Merge commit '36c66dd290d3ce6eb1ccd310d0c658d4a32bb8eb' as 'repos/effect'

repos/effect/.changeset/semantic-matching.md

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+---
+"effect": patch
+---
+
+Use semantic matching for TemplateLiteral parsing and index signature keys
+
+Replace regex-based TemplateLiteral parsing with backtracking segmentation over
+template literal parts, applying part checks during matching.
+
+Use schema membership when selecting Record index signature keys, including
+checked string, number, symbol, and TemplateLiteral parameters. Tighten valid
+index signature parameters on both type and encoded sides, and preserve key
+parameter semantics in codec transformations.