Beava v0.0.6

chore(release): bump version to 0.0.6 (#154)

Cuts 0.0.6: the Phase 27.1 snapshot fork-COW + WAL hardening (SEV-1
incident fix) and docs alignment, both already merged to main via #152.

• Bump Cargo.toml (workspace) + python/pyproject.toml to 0.0.6
• Refresh Cargo.lock
• CHANGELOG [0.0.6] entry

Tag v0.0.6 will be pushed after merge to fire the release workflows
(GitHub Release, wheels, Docker, Homebrew).

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Co-authored-by: Hoang Phan hoang@beava.dev
Co-authored-by: dosubot[bot] <131922026+dosubot[bot]@users.noreply.github.com>