- Add exit code policy to doctor command help text
- Update --exit-on-fail flag help to clarify default behavior
- Add code comment explaining why --exit-on-fail is a no-op
Exit codes per plan section 6.10:
- Exit 0: all checks OK or WARN (no FAIL)
- Exit 1: at least one check is FAIL
- Exit 2: CLI parse error (clap default)
Closes: pdftract-4sky1
Co-Authored-By: Claude Code <noreply@anthropic.com>
