Permission changes not detected by FSEvents on macOS

[xenoscopic]

For some reason the github.com/rjeczalik/notify package isn't detecting file permission changes on macOS. The github.com/fsnotify/fsevents does seem to work in this regard. I think we'll need to swap out the former with the latter.

Both of these packages have their little quirks, and it's mostly the fault of FSEvents. We may want to investigate a more holistic refactoring of recursive watching.

[xenoscopic]

In the mean time, as a workaround, one can simply update the file modification timestamp with touch to trigger a rescan.

[xenoscopic]

Closed by 6900074.