Right now there's no way to identify types outside of MB other than by their names (which we have changed before). We don't expose the row ids in the ws, after all. So, I think we should add a gid column to the following tables, in the same way we do for link_type and link_attribute_type:

area_type
area_alias_type
artist_alias_type
artist_type
cover_art_archive.art_type
editor_collection_type
event_alias_type
event_type
gender
instrument_alias_type
instrument_type
label_alias_type
label_type
medium_format
place_alias_type
place_type
recording_alias_type
release_alias_type
release_group_alias_type
release_group_secondary_type
release_group_primary_type
release_packaging
release_status
series_alias_type
series_ordering_type
series_type
work_alias_type
work_attribute_type
work_attribute_type_allowed_value
work_type