chore: release v2.2.0

[jdx]

🤖 New release: v2.2.0

This PR bumps the workspace to v2.2.0 and regenerates CHANGELOG entries, aube.usage.kdl, the CLI docs, and the benchmark results.

See the diff for the full set of changes, or the per-crate CHANGELOG.md files for the release notes that will ship.

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Generated by the release-plz-pr workflow.

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Note

Low Risk
Release metadata and changelog only; functional changes were merged separately and are summarized here for tagging.

Overview
This is an automated release-plz PR that cuts v2.2.0: it bumps [workspace.package].version and every aube-* crate entry in Cargo.lock from 2.1.0 → 2.2.0, updates release.json, and adds matching 2.2.0 sections across the per-crate CHANGELOG.md files.

The notes being stamped for this release (from work already merged on main) highlight embedder-facing node-gyp bootstrap (#1365), an install fix to bundle curated packageExtensions (#1369), plus the usual benchmark refresh (#1372). There is no new feature code in this diff—only versioning and release documentation.

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