Update app.py

add logs for model load

app.py

@@ -43,6 +43,10 @@ os.environ["AWS_SECRET_ACCESS_KEY"] = os.getenv("AWS_SECRET_ACCESS_KEY")
 mlflow.set_tracking_uri(MLFLOW_TRACKING_APP_URI)
 model_uri = f"models:/{MODEL_NAME}@{STAGE}"
 model = mlflow.sklearn.load_model(model_uri)
+if model is None:
+    raise ValueError("Model not found.")
+else:
+    print("Model loaded.") 
 
 app = FastAPI(
     title="API for Fraud Detection Project",