CI: Gradle 9.8.0 -> 9.8.1

[bernardladenthin]

Summary

• Gradle 9.8.0 → 9.8.1 (released 2026-10-07). It changes the literal in the verify-signing-key-gradle job, which is kept identical in all four sibling repos, and refreshes its hash in .github/shared-files.sha256. In java-llama.cpp it also changes GRADLE_VERSION for the Android jobs.
• This commit belonged to the previous PR, but that PR was merged before it was pushed. It is replayed here onto the new main.
• The dependency and plugin sweep behind it found nothing else to update:
  • versions-maven-plugin over every POM: all plugins are current, and the only newer dependency is jqwik 1.10.1, which stays at 1.9.3 by policy.
  • Versions inside plugin configuration are current: Error Prone, NullAway, Checker, Lombok, JMH, jcstress, palantir-java-format.
  • AGP, Kotlin, AndroidX and the Compose BOM are current.
  • check-versions.py reports 0 differences between the four repos.

Test plan

• check-shared-files.py reports 0 files changed here alone. The job hash is identical on all four branches, so the cross-repo warnings clear once all four are merged.
• check-run-scripts.py passes, and the buildcheck unit tests pass.
• CI is green on this branch. verify-signing-key-gradle runs with 9.8.1.

Related issues / PRs

The same change is made in java-llama.cpp, BitcoinAddressFinder, streambuffer and srcmorph.

Checklist

• I have read CONTRIBUTING.md and CODE_OF_CONDUCT.md
• My commits follow Conventional Commits. They use the repository's usual CI: prefix instead.
• No security-sensitive changes

🤖 Generated with Claude Code

https://claude.ai/code/session_01AytmJF9faEiQEVt6eetQS2

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Generated by Claude Code

[claude]

Review Summary

✅ Approved — This is a straightforward, low-risk patch version bump.

Observations

1. Change scope is minimal and correct: Gradle 9.8.0 → 9.8.1 in the verify-signing-key-gradle job, with corresponding hash update in .github/shared-files.sha256.

2. Shared-files mechanism: The hash update correctly reflects the workflow change, maintaining consistency with the cross-repo synchronization pattern documented in CLAUDE.md.

3. No dependency conflicts: The PR description notes the dependency sweep found no other updates needed (jqwik stays at 1.9.3 per policy).

4. Documentation: The PR description is clear and thorough, explaining the relationship to sibling repos (java-llama.cpp, BitcoinAddressFinder, streambuffer).

5. Test verification: buildcheck tests (check-shared-files.py, check-run-scripts.py) have passed.

Checklist

• No security concerns — patch version of build tool
• No code quality issues
• Follows established patterns and conventions
• Awaiting CI green status (noted in test plan)

Once CI confirms green on this branch with Gradle 9.8.1, this should be ready to merge.