Add working dataframe to session state in app.py for improved data management

- Stored the processed working dataframe in session state to enhance data accessibility and management.
- This update ensures that the current state of the working dataframe is readily available for user interactions, aligning with previous enhancements to improve user experience.

app.py

@@ -316,6 +316,7 @@ with tab2:
             working_df['percentile_finish'] = working_df['index'].rank(pct=True)
             working_df['finish'] = working_df['index']
             working_df = working_df.drop(['sorted', 'index'], axis=1)
+            st.session_state['check_working_df'] = working_df
         
         elif type_var == 'Showdown':
             # Vectorized stack calculation for Showdown