v3.9.3

Fixed

• resolve shexli path mismatch on macOS caused by /var symlink
• fall back to username if display name is unavailable (#34)

Changed

• show changelog preview and commit message in release.sh dry-run
• add hustlerone to AUTHORS
• add --dry-run flag to release.sh for safe preview
• add build validation step to release.sh before push
• remove duplicate entries from CHANGELOG unreleased section
• fix release workflow referencing deleted ci-checks.yml
• inline reusable workflow to fix branch protection check name mismatch
• fix PR template CHANGELOG contradiction and add debug instructions to CONTRIBUTING
• document metadata.json fields in RELEASING.md
• add lifecycle flow to scripts overview in RELEASING.md
• add scripts overview and pin shexli version in RELEASING.md
• document contributor-facing scripts in CONTRIBUTING
• document shexli checks, failure behavior, and macOS limitation in CONTRIBUTING
• add local shexli validation instructions to CONTRIBUTING
• pin shexli to 0.2.1 to avoid unexpected breakage on new releases