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/colonies.e2e-spec.ts

@@ -35,6 +35,7 @@ describe('Colonies (e2e)', () => {
   let apiaryBId: string;
   let colonyId: string;
   let childColonyId: string;
+  const splitColonyIds: string[] = [];
   let colonyToMergeId: string;
   let healthColonyId: string;
   let raceColonyId: string;
@@ -83,6 +84,7 @@ describe('Colonies (e2e)', () => {
       colonyToMergeId,
       healthColonyId,
       raceColonyId,
+      ...splitColonyIds,
     ].filter(Boolean);
     // Rule tasks are written without a user - their audit entry and
     // TaskCreated are not covered by the userId cleanup below.
@@ -190,6 +192,55 @@ describe('Colonies (e2e)', () => {
     expect((history.body as ColonyHistoryBody).lineageAsSource).toHaveLength(1);
   });
 
+  it('records ColonySplit with the given day and queen source, and refuses a future day', async () => {
+    await request(app.getHttpServer())
+      .post(`/api/v1/colonies/${colonyId}/split`)
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .send({
+        code: `V-${Date.now()}-F`,
+        colonyType: 'NUCLEUS_COLONY',
+        date: '2999-01-01',
+      })
+      .expect(400);
+    await request(app.getHttpServer())
+      .post(`/api/v1/colonies/${colonyId}/split`)
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .send({
+        code: `V-${Date.now()}-T`,
+        colonyType: 'NUCLEUS_COLONY',
+        date: '2026-05-05T23:30:00+02:00',
+      })
+      .expect(400);
+
+    const response = await request(app.getHttpServer())
+      .post(`/api/v1/colonies/${colonyId}/split`)
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .send({
+        code: `V-${Date.now()}-B`,
+        colonyType: 'NUCLEUS_COLONY',
+        date: '2026-05-05',
+        queenSource: 'QUEEN_CELL',
+      })
+      .expect(201);
+    const splitId = (response.body as ColonyBody).id;
+    splitColonyIds.push(splitId);
+
+    const lineage = await prisma.colonyLineage.findFirstOrThrow({
+      where: { toColonyId: splitId },
+    });
+    expect(lineage.queenSource).toBe('QUEEN_CELL');
+    expect(lineage.date.toISOString().slice(0, 10)).toBe('2026-05-05');
+    const event = await prisma.domainEvent.findFirstOrThrow({
+      where: { type: 'ColonySplit', aggregateId: splitId },
+    });
+    expect(event.payload).toEqual({
+      parentColonyId: colonyId,
+      lineageId: lineage.id,
+      queenSource: 'QUEEN_CELL',
+      splitOn: '2026-05-05',
+    });
+  });
+
   it('merges another colony into the surviving one', async () => {
     const otherColony = await request(app.getHttpServer())
       .post('/api/v1/colonies')