Jade resolves tamed-animal owner names client-side; its Mojang profile
lookup can't resolve offline-mode UUIDs and it falls back to NeoForge's
UsernameCache, which the client loads from <game>/usernamecache.json.
Ship that file (side = "client", installed at the game root) so migrated
owners stop showing as "???".
Maintain the mapping with tools/sync-usernamecache.py after new logins.
cache/c2me-dfc is regenerated on every server start (the .class files
even swap contents between runs) and is already excluded from the pack
by .packwizignore. Drop it from git and add a .gitignore so it cannot
be committed again.
logan