v0.2.2

Fixed

• Prebuilt macOS install channels worked only with Homebrew LLVM present
  (caught by the new staging-validation pipeline). Two defects in the v0.2.1
  artifact: (1) cargo binstall failed because the tarball omitted
  timing_analysis, a non-optional jacquard-package bin — it now ships in
  the tarball (and the Homebrew formula installs it); (2) the binary links
  Homebrew LLVM's libc++/libomp, so it failed to launch on machines
  without LLVM — the Homebrew formula now depends_on "llvm", and the
  binstall/raw-tarball LLVM runtime prerequisite is documented in
  docs/installation.md.

Added

• Staging install-validation pipeline for release candidates. Tagging a
  SemVer pre-release (vX.Y.Z-rc.N) now publishes a GitHub prerelease
  (never "Latest"), and a new Validate install (staging) workflow
  (validate-install.yml, workflow_dispatch) runs the documented end-user
  install commands against that prerelease asset — cargo binstall (compile
  fallback disabled, so a missing/misnamed asset fails hard) and
  brew install (the formula repointed at the prerelease tarball, installed
  from a throwaway local tap). A green run is the promotion gate. See
  docs/release-process.md § Staging validation.

Changed

• Unified the first-party Rust crate versions. jacquard,
  opensta-to-ir, and timing-ir ship together in one release tarball
  and now carry a single shared version (the two helper crates move
  0.1.0 → 0.2.1 to match jacquard; both are publish = false, so no
  external version contract changes). A new scripts/bump_version.py is
  the single source of truth — bump_version.py <X.Y.Z> sets all three,
  and release.yml runs bump_version.py --check <tag> as a verify-guard
  that aborts a release if the tag and crate versions disagree.
  netlist-graph continues to version independently.