DevOps: optimize repo by untracking models and dynamic data assets; implement blended alert risk calibration

ml: retrain XGBoost from scratch + restore original int(proba*99) scoring

fix: re-track xgb_scaler.pkl via LFS

Merge origin/chauhan: bring in UI redesign and frontend enhancements

Upload folder using huggingface_hub

fix: patch GNN checkpoint with correct feature mean/std from features.pkl

fix: restore ML models, fix deployment paths, sync alert risk scores with XGBoost

Initial commit: Fund Flow Tracker AML Dashboard