- Fix HEAD~1...HEAD error for shallow clones by using github.event.before/after
- Add proper error suppression with 2>/dev/null
- Add fallback logic for edge cases (initial commits, force pushes)
- Archive resolved runner setup issue to docs/issues/archive/resolved/
- Add archive documentation and next steps guide
Fixes workflow execution on test/runner-validation branch.
Resolves issue with 'fatal: bad revision' error in logs.
