Update model card: document isolation_forest.py dependency and KPIs

Refresh model metadata (module dep + KPIs 2026-08-13)

Add importable IsolationForest implementation module for reproducible model loading

Re-upload IsolationForest model serialized against importable isolation_forest module

Update model card with 2026-08-13 details

Update model metadata with 2026-08-13 KPIs

Upload retrained IsolationForest risk model (2026-08-13)

Add daily IsolationForest high-risk detector to model/ (joblib + metadata + model card)