Iterate on @welshman/domain following review:
- base: add `group`/`protect`/`expires` behavior tags (parsed in base, emitted
via addBehaviorTags before hashing) and an `extraTags` passthrough (opt-in via
reservedTagKeys) so tag carry-over lives in one place; migrate Handler, Comment,
Thread onto it. Comment gains nested root/parent ref structs + setters.
- List: fix inverted keepTags; add clearTags/clearPublicTags/clearPrivateTags and
use them in the relay/server list setters.
- RelayList: preserve complementary read/write capability instead of dropping
modeless entries.
- Split Relay/Room membership ops into per-kind classes (RelayAddMember/
RelayRemoveMember, RoomAddMember/RoomRemoveMember) over a shared base.
- TimeEvent (renamed from CalendarEvent): derive "D" day tags in toTemplate.
- Feed: default to an empty feed, fail parse when the "feed" tag is missing.
- RelaySet added; CommunityList renamed to GroupList; predicate bare add/remove
mutators; RoomMeta uses randomId; PollResponse.selections drops pollType.
- Remove ChannelList, FileServerList, Settings, and event-asserting getAddress/
display accessors.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V67tPYdvh1qCkjEBhJGZUR