feat: update tests + seed script, add ecology→board migration

- useOnboarding.test.js: hasEngagedEcology→hasEngagedBoard, /api/ecology/suggestions→/api/board/suggestions, ecology key/route→board in test assertions
- onboarding-status.test.js: stale description strings updated
- seed-welcome-tester.cjs: communityEcology→board, ecologyPageVisited→boardPageVisited
- migrate-ecology-to-board.cjs: one-time migration renames three member fields and activity log action values

scripts/seed-welcome-tester.cjs

@@ -1,6 +1,6 @@
 /**
  * Seed a fresh member in the right state to test the Welcome Workflow.
- * All onboarding flags default to false/null, no craft tags, no ecology topics.
+ * All onboarding flags default to false/null, no craft tags, no board topics.
  *
  * Usage: node scripts/seed-welcome-tester.js
  * Then pick "Welcome Tester" from the dev login dropdown.
@@ -29,11 +29,11 @@ async function main() {
         role: "member",
         status: "active",
         craftTags: [],
-        communityEcology: { topics: [], offerPeerSupport: false },
+        board: { topics: [], offerPeerSupport: false },
         onboarding: {
           completedAt: null,
           eventPageVisited: false,
-          ecologyPageVisited: false,
+          boardPageVisited: false,
           wikiClicked: false,
         },
       },