Update Eclipse compiler settings to Java 21#7
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The Eclipse project settings had source/target/compliance stuck at Java 11, causing 'type patterns' errors when opening the project in Eclipse. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
.settings/org.eclipse.jdt.core.prefsto set source, target, and compliance level to 21 (was 11)compiler.releaseto enforce the correct API levelFixes the Eclipse error: "the Java feature 'type patterns' is only available with source level 16 and above" caused by the settings file still targeting Java 11 after the project was upgraded to Java 21.
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