chore: Add missing return statement

app.py

@@ -83,6 +83,8 @@ def clean_data(df):
         # Rename column
         df.rename(columns={"Hourly_Labor_Hours_Total": "value"}, inplace=True)
 
+        return df
+
     elif "Date_CY" in df.columns and "Hour" in df.columns and "Net_Sales_CY" in df.columns:
         # Convert "Date_CY" and "Hour" columns into datetime format
         df["timestamp"] = pd.to_datetime(df["Date_CY"]) + pd.to_timedelta(df["Hour"].astype(int), unit='h')