Update contest date mapping in grab_contest_names function for improved consistency

- Modified the contest_date_map to convert the 'Date' column to string format before replacing hyphens, ensuring consistent date representation.
- This change enhances data integrity and aligns with ongoing efforts to improve data processing within the application.

app.py

@@ -26,7 +26,7 @@ def grab_contest_names(db, sport):
     curr_info['Date'] = curr_info['Date'].dt.strftime('%Y-%m-%d')
     contest_names = curr_info['Contest Name']
     contest_id_map = dict(zip(curr_info['Contest Name'], curr_info['Contest ID']))
-    contest_date_map = dict(zip(curr_info['Contest Name'], curr_info['Date'].replace('-', '')))
+    contest_date_map = dict(zip(curr_info['Contest Name'], curr_info['Date'].astype(str).replace('-', '')))
     
     return contest_names, contest_id_map, contest_date_map, curr_info