MWAX triggers can cause duplicate files to be archived

[gsleap]

This results in errors like this in mwax_subfile_distributor on the MWAX boxes:

2024-11-06 06:56:14,821, ERROR, work_checksum_and_db, 1414825232_1414825280_58.sub insert_data_file_row() error inserting data_files record in data_files table: RetryError[<Future at 0x7fe8f5147f10 state=finished raised UniqueViolation>]. SQL was INSERT INTO data_files
2024-11-06 06:57:25,139, ERROR, work_checksum_and_db, execute_single_dml_row(): unknown Error- duplicate key value violates unique constraint "data_files_1400_pkey"

In this example, trigger 9388 occurred during an MWAX_BUFFER observation 1414825232.

Needs more investigation to determine why there ended up being duplicate files.