Add final BallFilter, train/valid scripts, train-derived sum filters

- final_BallFilter: CSV history loader, TRAIN_ALLOW for 6-sum and week diff,
  fix filterOneDigitPattern ball overwrite bug, drop socket call
- final_filter_params: build sum6 and abs_sum_diff from rounds 1-800
- filter_model re-exports BallFilter; train/valid evaluate pass-through counts
- final_filterTest aligned with 1_FilterTest_25 plus optional MC survivors
- README and scripts/run_with_ncue.sh for ncue workflow

Made-with: Cursor

filter_model.py

@@ -0,0 +1,8 @@
+"""
+로또 필터 로직은 `final_BallFilter.BallFilter`에 구현되어 있습니다.
+학습·검증 스크립트와 동일한 클래스를 쓰도록 이 모듈에서 재노출합니다.
+"""
+
+from final_BallFilter import BallFilter
+
+__all__ = ["BallFilter"]