Detects ticket number from branch name (patterns: feat/42-desc, fix/42-desc,
42-desc, issue-42-desc) and appends the full Forgejo issue URL to the commit
body if not already present.
Closes: Circuit-Forge/circuitforge-infra#20
- Quote $CONFIG_ARG in pre-commit and pre-push to prevent word-splitting
on paths with spaces or special characters
- Add `git rev-parse HEAD` guard in pre-push so gitleaks is skipped on
repos with no commits yet (gitleaks git exits non-zero on empty history)
- Expand pre-push header comment to document the empty-repo skip and note
the full-history scan tradeoff for large repos
