That was all answered in the original thread linked above, but anyway see Minutely updated vector tiles demo
it says minutely updated, but the tiles I just got from here
https://pnorman.github.io/tilekiln-shortbread-demo/#17.88/41.860264/12.494244
are older, maybe there is some caching happening somewhere?
See in OpenStreetMap:
https://www.openstreetmap.org/#map=19/41.860138/12.494310
The way in question was changed 5 days ago: https://www.openstreetmap.org/way/44327374