Prepare v0.2.9 release

[yvette-carlisle]

Summary

• bump workspace/package versions from 0.2.8 to 0.2.9
• refresh Cargo.lock package versions for the release

Verification

• cargo metadata --locked --no-deps --format-version 1
• python3 /Users/x/.codex/plugins/cache/hack-ink/playbook/0.3.0/scripts/semantic_drift_audit.py --rev origin/main
• rg -n '0.2.8|v0.2.8' (no matches)
• cargo make checks
• cargo make test-host-reset
• cargo make test-macos-native-host-stage
• scripts/smoke/macos.sh
• scripts/perf/macos.sh