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/colonies/colonies.service.ts

@@ -17,6 +17,7 @@ import { MergeColonyDto } from './dto/merge-colony.dto';
 import { isLivingColonyStatus } from './colony-status';
 import { lockRowsForUpdate } from '../prisma/row-lock';
 import { colonyTransitionEvents, lockColony } from './colony-events';
+import { berlinToday, dayToDate } from '../common/dates';
 
 export interface ColonyFilter {
   status?: ColonyStatus;
@@ -194,9 +195,16 @@ export class ColoniesService {
     dto: SplitColonyDto,
     actingUserId: string,
   ): Promise<Colony> {
-    const parent = await this.findById(id);
-    this.assertActive(parent);
+    await this.findById(id);
+    const today = berlinToday();
+    const splitOn = dto.date ?? today;
+    if (splitOn > today) {
+      throw new BadRequestException('Das Datum liegt in der Zukunft.');
+    }
+    const queenSource = dto.queenSource ?? null;
     const child = await this.prisma.$transaction(async (tx) => {
+      const parent = await lockColony(tx, id);
+      this.assertActive(parent);
       const created = await tx.colony.create({
         data: {
           code: dto.code,
@@ -205,12 +213,13 @@ export class ColoniesService {
           notes: dto.notes,
         },
       });
-      await tx.colonyLineage.create({
+      const lineage = await tx.colonyLineage.create({
         data: {
           type: 'SPLIT',
           fromColonyId: parent.id,
           toColonyId: created.id,
-          date: new Date(),
+          date: dayToDate(splitOn),
+          queenSource,
           notes: dto.notes,
         },
       });
@@ -224,6 +233,18 @@ export class ColoniesService {
         },
         tx,
       );
+      await this.events.record(tx, {
+        type: 'ColonySplit',
+        aggregateType: 'Colony',
+        aggregateId: created.id,
+        actorUserId: actingUserId,
+        payload: {
+          parentColonyId: parent.id,
+          lineageId: lineage.id,
+          queenSource,
+          splitOn,
+        },
+      });
       return created;
     });
     return child;