When I checked today I found this:
2024-08-21T12:13:05Z INFO lazyfilewalker.trash-cleanup-filewalker subprocess exited with status
This suggests that it was indeed running. Subsequently the filewalker restarted with the expected log message.
So it appeared to be running all the time while the logs got deleted,
This brings back one of my suggestions:
It would be good if such long running tasks would have a log message while they are running and what they are currently doing (like which date folder currently being worked on)
This would make tracking progress much easier.