The scheduled task populated LAUNCHBOX_MAME_KEY from Mame.xml but no
handler code ever read it, so arcade ROMs like pacman.zip never matched
against Metadata.xml (which keys on full titles like "Pac-Man"). Add
RemoteSource.get_mame_entry() and an ARCADE branch in get_rom() that
resolves the MAME filename to its Description before name lookup.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>