[Java] Add win32-arm64 native runtime support

[Copilot]

Extends Java in-process runtime support and Maven packaging to Windows ARM64, following the existing native-classifier model.

• Native packaging

  • Add native-win32-arm64 Maven profiles.
  • Package runtime.node, copilot.exe, and platform metadata.
  • Validate and attach win32-arm64 publication artifacts.

• CI and publishing

  • Add win32-arm64 to the in-process test matrix using windows-11-arm.
  • Build and verify the classifier in snapshot, release, and publication-validation workflows.

• Validation and documentation

  • Add host, staging, classifier, and local-publication coverage.
  • Document Windows ARM64 usage and published classifier support.

• Fixes [Java] Add support for win32-arm64 #2422

[github-actions]

Cross-SDK Consistency Review ✅

This PR adds Windows ARM64 native runtime support to the Java SDK packaging — all 12 changed files are in Java CI workflows, Java native packaging scripts, Java documentation, and Java POMs.

No cross-SDK inconsistencies identified. This is Java-specific infrastructure for native binary bundling (win32-arm64 classifier), which doesn't correspond to any API surface change that other SDKs (Node.js, Python, Go, .NET, Rust) would need to implement. The other SDKs use different distribution mechanisms and don't have equivalent native classifier packaging.

The changes are appropriately scoped to Java's native bundling strategy (see ADR-007).

Generated by SDK Consistency Review Agent for #2423 · sonnet46 17 AIC · ⌖ 5.36 AIC · ⊞ 6.6K · ◷

[Copilot]

Pull request overview

Adds complete Java Windows ARM64 native runtime support across packaging, validation, testing, publishing, and documentation.

Changes:

• Adds win32-arm64 Maven classifier packaging and host detection.
• Extends CI, publication validation, snapshot, and release workflows.
• Adds validation tests and usage documentation.

Show a summary per file

File	Description
java/sdk/pom.xml	Selects ARM64 runtime on Windows ARM64 hosts.
java/copilot-native/pom.xml	Packages and attaches the new classifier.
java/copilot-native/scripts/validate-native-host.mjs	Validates Windows ARM64 hosts.
java/copilot-native/scripts/validate-native-host.test.mjs	Tests host validation.
java/copilot-native/scripts/fetch-native.test.mjs	Covers ARM64 staging behavior.
java/copilot-native/scripts/validate-native-artifact.test.mjs	Tests classifier and publication artifacts.
java/copilot-native/scripts/validate-local-publication.mjs	Requires and validates the classifier.
.github/workflows/java-sdk-tests.yml	Adds ARM64 runtime and publication CI.
.github/workflows/java-publish-snapshot.yml	Builds and publishes snapshot artifacts.
.github/workflows/java-publish-maven.yml	Builds and publishes release artifacts.
java/README.md	Documents Windows ARM64 usage.
java/docs/adr/adr-007-native-bundling-strategy.md	Updates supported-platform architecture decisions.

Review details

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• Files reviewed: 12/12 changed files
• Comments generated: 0
• Review effort level: Balanced