Lock in the Green (part 1)

[sqt]

Some workflow updates to improve CI / release parity and coverage.

[greptile-apps]

Greptile Summary

The PR aligns release validation more closely with CI and adds relocatable prebuilt C/C++ bundles.

• Runs binding smoke tests across release platforms, including Java where supported.
• Aligns self-interoperability dependencies and Python setup with the external harness.
• Generates a ${pcfiledir}-relative pkg-config prefix and validates bundle contents before publication.
• Updates design and roadmap documentation to reflect completed and deferred coverage work.

Confidence Score: 5/5

The PR appears safe to merge.

The previously reported stale pkg-config prefix is fixed by deriving the installation root from the installed .pc file’s directory, and no blocking failure remains.

Important Files Changed

Filename	Overview
.github/workflows/release.yml	Adds binding gates, interop environment alignment, platform library packaging, artifact publication, and a check that the pkg-config prefix is relocatable.
build.zig	Replaces the stale build-time pkg-config prefix with a standard ${pcfiledir}/../.. prefix matching the installed layout.
docs/design/ci-platform-coverage-expansion.md	Records completed ReleaseFast and allocator coverage and documents the upstream blocker for ReleaseSmall.
docs/roadmap.md	Reorganizes CI and release coverage into landed, deferred, and still-open work.
examples/docs/design/waitset-reference-app.md	Updates the reference-app status to reflect all four language ports and current sanitizer coverage.

_{Reviews (2): Last reviewed commit: "resolving review comments" | Re-trigger Greptile}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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