changed model to pickle

app.py

@@ -61,7 +61,7 @@ def load_data():
 def main():
     # Load data and model
     data = load_data()
-    model = load('rf_model.joblib')
+    model = load('rf_model.pkl')
     
     # Generate forecasts
     features = data.drop(columns=['power_consumption_kwh', 'timestamp'], errors='ignore')