Remove dependency on detection files for keeping track of audio files processed

[aditya-uw]

Just a reminder to come back and fix the issue where in code method:
construct_activity_arr_from_location_summary under activity_assembly.py you compute all_processed_files by doing sorted(list(map(str, list(Path(f'{file_paths["raw_SITE_folder"]}').glob('*.csv'))))).
This is problematic as the files in this folder will change.

Use the method you use in your batdetect2_pipeline code where you read ubna_data_01_mir_collected_audio_records.csv to get the similar value for all_processed_files