FR - Create a work todo log

[thezak48]

Can we have namer ether not yolo all files into the work dir, and only move a few at a time (idk only have 10 files in there at any one time), or keep a log of what has been moved into the work folder so that in case of a restart it knows "Oh I still have this to do"
Otherwise I have to keep moving the unprocessed files back into the watch folder every time the docker container freaks out and restarts