change local llm to huggingface inference API

utils/scenario_engine_ng.py

@@ -173,7 +173,7 @@ def _expected_features(model, df: pd.DataFrame, target: str = "churn") -> List[s
 def simulate_plan(
     plan: List[Dict[str, Any]],
     data_path: str = "data/data_randomforest.csv",
-    model_path: str = "models/app_best.joblib",
+    model_path: str = "app_best.joblib",
     target_col: str = "churn",
 ) -> Dict[str, Any]:
     """