Model, schemas, API routes, activity log, and all server handlers
updated. Old ecology/ and community-ecology routes removed, new
board/ routes added. Tests updated and new board-suggestions tests
written (10 cases).
Update member directory and public profile APIs to include craftTags
and communityConnections with privacy-aware filtering. Directory now
uses predefined tags from the Tag model for filter bars and supports
craftTag/connectionTag query filters. Frontend shows craft tag pills
and cooperative topics with state labels, falling back to old
offering/lookingFor fields. Add Connections nav item.
