1080p. NOT 2K.
The rest sounds about right but i’m pretty sure in 1997 digital intermediates were almost exclusively scanned in at 2K and not 1080p. Unless you have a source for this.
I figure the 2004 master was done in 1080p as it was done primarily for DVD/BR release and DCP hadn’t been invented yet.
Edit: There’s a great writeup about the whole workflow but i cant find it.
Found it. https://web.archive.org/web/20150227122715/http://secrethistoryofstarwars.com/savingstarwars.html