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/src/domain-events/domain-events.service.spec.ts

@@ -183,7 +183,7 @@ describe('DomainEventsService', () => {
 
 describe('domain event catalog', () => {
   it('lists every event type exactly once', () => {
-    expect(DOMAIN_EVENT_TYPES).toHaveLength(23);
+    expect(DOMAIN_EVENT_TYPES).toHaveLength(25);
     expect(new Set(DOMAIN_EVENT_TYPES).size).toBe(DOMAIN_EVENT_TYPES.length);
     expect(DOMAIN_EVENT_TYPES).toEqual(
       expect.arrayContaining([
@@ -191,6 +191,8 @@ describe('domain event catalog', () => {
         'StockChanged',
         'TaskDue',
         'InspectionOverdue',
+        'ColonySplit',
+        'QueenAssigned',
       ]),
     );
   });