v0.4.1

Changed

• CLI confidence values print with three decimals (0.796, not 0.80): two-decimal
  rounding could display a value at a floor it does not actually reach, making
  stats rule counts and check output look contradictory. Thresholds and the
  README's worked examples updated to match.
• README: real CLI demo screenshots (stats, check with the decision guide,
  pre-commit hook), fixed section anchor links, quick-start reshuffle.