chore(release): prepare v0.2.2

[4mGLn]

Outcome

• Bumps the workspace runtime version to 0.2.2.
• Finalizes the released changelog section and versioned archive example.

Evidence

• make check passed.
• make package-release VERSION=v0.2.2 and the archive install smoke test passed.
• Upgrade/rollback smoke test passed from the published v0.2.1 archive.
• Release-preparation commit is signed.

Residual gaps

• The tagged workflow will provide the required multi-platform archive, provenance, and prior-public-release upgrade proof.

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