rename communityEcology → board across backend

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).

server/api/auth/member.get.js

@@ -22,7 +22,7 @@ export default defineEventHandler(async (event) => {
     location: member.location,
     socialLinks: member.socialLinks,
     craftTags: member.craftTags,
-    communityEcology: member.communityEcology,
+    board: member.board,
     showInDirectory: member.showInDirectory,
     notifications: member.notifications,
     privacy: member.privacy,