chore(release): 2.2.0

[acidkill]

Summary

Release 2.2.0 (minor — new features from #8). Version unified to 2.2.0 across all packages: pyproject.toml, src/surreal_memory/__init__.py, the pinned test_health_fixes assertion, the 3 npm/vscode package.json and their package-lock.json roots, and CHANGELOG.md.

What's in 2.2.0 (merged via #8)

• Honor SURREAL_MEMORY_EMBEDDING_* env overrides in the unified config (env > config.toml > default).
• smem reindex — (re)embed neurons with the effective provider (--dry-run, --missing-only/--all).
• Effective config wins — embedding resolves from config.toml + env, not the stale stored brain config (fixes silently-disabled embeddings).
• Stop hook no longer loads a sentence-transformers model every session end.

Release steps (after merge)

1. Publish the prepared draft release v2.2.0 (targets main) → tag v2.2.0 → release.yml validates (tag == pyproject == init) and publishes PyPI (npm/ClawHub/VSCode skip cleanly if unconfigured, per ci: stop unconfigured-publisher noise (remove Telegram + fail-safe npm/ClawHub) #7).

Test plan

• version == 2.2.0 across all sources (+ lockfile roots); test_version_is_current passes
• CHANGELOG [2.2.0] added
• CI green on this PR