Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
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2026-09-21 15:08:50 +00:00
committed by Claude
co-authored by Claude Sonnet 5
commit f59c1de96d
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Identify ThreadLocal usages in this file. Propose a migration to Java 25 ScopedValue, showing before/after code and explaining why ScopedValue is safer under virtual threads and structured concurrency.