feat: T4 wave 3 - notifications per user, suggestions API, varroa bands, split/queen events

- Schema III: per-user notifications (broadcast fan-out migration,
  category, link, requiredPermissions filter), notification preferences
  and settings endpoints, calendar withdrawal switch, occupiedFrames
- Suggestions API: list/summary with permission visibility and paging,
  accept/dismiss/reopen incl. bulk, SuggestionView on all responses
- Varroa traffic light by season and method, young colonies, treatment
  effect window, sample-based percentage; shared withdrawal-window helper
  on Berlin calendar days; GET /varroa-measurements/thresholds
- ColonySplit and QueenAssigned domain events with calendar and webhook
  handlers
- Outbox claims compare against now() rounded to timestamp(3); fixes the
  flaky e2e claims of rows written with SQL now()

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/test/automation.e2e-spec.ts

@@ -266,7 +266,12 @@ describe('Automation rules (e2e)', () => {
     const notifications = await prisma.notification.findMany({
       where: { relatedId: colonyId },
     });
-    expect(notifications).toHaveLength(1);
+    // One copy per user who may read tasks, never a broadcast.
+    expect(notifications.length).toBeGreaterThan(0);
+    expect(notifications.every((n) => n.category === 'SUGGESTION')).toBe(true);
+    expect(new Set(notifications.map((n) => n.userId)).size).toBe(
+      notifications.length,
+    );
   });
 
   it('does not trigger when the queen was seen', async () => {