pristine-sweep-cron-false-positive-on-feedback-format

The setup-pristine-sweep.py cron initially flagged 2 false positives: it checked for exact **How to apply:** header in feedback files, but the actual convention is **How to apply (mandatory standards):**. The regex was corrected to match the parenthetical variant. One genuine finding was feedback_quality_over_size.md predating the format contract — that was fixed. Always verify drift findings are genuine before treating them as real issues.