Fix SapMachine early-access filtering

[jdubois]

Summary

• make SapMachine GA and EA candidate filtering mutually exclusive
• classify both boolean and string forms of the SapMachine ea metadata
• add a deterministic fixture where a newer GA candidate previously won an EA request
• regenerate the setup distribution bundle

Validation

• Targeted SapMachine tests: 38 passed
• Full test suite: 41 suites and 1,316 tests passed
• Prettier, ESLint, build, npm audit, and dist reproducibility
• Fork validation run: https://github.com/jdubois/setup-java/actions/runs/31011224207
• Upstream workflows (awaiting maintainer approval for forked workflows)

Closes #1216

[Copilot]

🟢 Ready to approve

The change correctly enforces mutually exclusive GA/EA filtering and adds targeted regression tests (including mixed boolean/string ea metadata) covering the reported failure mode.

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Pull request overview

This PR fixes SapMachine early-access (EA) selection so that EA requests cannot resolve stable (GA) builds, aligning SapMachine filtering behavior with how -ea versions are normalized in the base installer.

Changes:

• Make SapMachine GA vs EA candidate filtering mutually exclusive by classifying ea metadata into a boolean isEarlyAccess and filtering via the request’s stable flag.
• Expand SapMachine manifest typing to accept both boolean and string forms of the ea field.
• Add regression coverage with a deterministic fixture containing competing GA and EA candidates, and regenerate the bundled dist/ output.

File summaries

File	Description
src/distributions/sapmachine/models.ts	Updates manifest typing to support ea as `boolean
src/distributions/sapmachine/installer.ts	Implements symmetric GA/EA filtering via isEarlyAccess classification.
tests/distributors/sapmachine-installer.test.ts	Adds fixture-backed tests to ensure EA requests never pick stable builds and validates mixed ea field encodings.
tests/data/sapmachine-release-classes.json	New deterministic manifest fixture with competing GA/EA candidates and mixed ea representations.
dist/setup/557.index.js	Regenerated distribution bundle reflecting the SapMachine filtering fix.

Review details

• Files reviewed: 4/5 changed files
• Comments generated: 0
• Review effort level: Lite

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