WinRacing V52.2 Pattern Confidence Learning
- Added Bayesian Beta(2,2) sample-size shrinkage.
- Added posterior hit rate, sample weight, pattern stability and pattern confidence score.
- Added PROMOTE / HOLD / DOWNGRADE / RETIRE advisory recommendation.
- Added pattern confidence summary metrics.
- No DB schema changes. No live-weight changes. V44-V51 remain immutable.
