Add app and server initialization for AION-Search model

- Initialize app with 'aionsearchmodel.pt' checkpoint
- Expose server at module level for compatibility with deployment

app.py

@@ -128,6 +128,8 @@ def main():
         port=args.port
     )
 
+app = create_app('aionsearchmodel.pt')
+server = app.server
 
 if __name__ == "__main__":
     main()