moderation api v2 (event arch) lexgen+refactor (#450)
Ran lexgen against new (admin) mod api v2 ("evented architecture").
Manually removed/resolved some un-related lexicon changes (we are in a
bit of hacky-y situation still with didDoc and threadgates). Fixed the
build.
There was a weird issue with cborgen tests which mutate in-repo source
files when running tests (present on current `main`) so committed that
change.