- install.sh: Add xattr/codesign fix after cp on macOS
- install.sh: Add portable timeout verification using perl
- INSTALL.md: Recommend cargo install --path as primary method
- INSTALL.md: Document macOS signature issue and fix
- blue doctor: Detect com.apple.provenance xattr with fix hint
- blue doctor: Verify code signature with codesign --verify
- blue doctor: 3-second liveness timeout for hanging binaries
Fixes dyld hang at _dyld_start when copied binaries have stale
signatures after Homebrew library updates.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
