Querying data from the log file/ log_df

Currently, the values stored in the log file aren't queried anywhere in the code, they are only read to create the log_df, and then updated with new logs. The most recent best scores are instead stored in and queried from the config file. It would be better to query the config and the log file, otherwise the available history is limited to only 1 run, the most recent, stored in the config file.