feat(backend): Webhooks mit HMAC-signierter Auslieferung (Modul 28)

WebhooksModule (WebhookSubscription: URL, Events, Secret, aktiv) mit
Event-Dispatcher, angehaengt an 10 Ereignisse in 8 bestehenden Services
(colony.created, inspection.created, queen.created, queen.replaced,
harvest.created, batch.created, batch.updated, product.stock_changed,
task.created, task.completed). Auslieferung ist best-effort und blockiert
die ausloesende Anfrage nicht bei Fehlern.

ApiCore-Backend/src/honey-batches/honey-batches.service.spec.ts

@@ -2,6 +2,7 @@ import { NotFoundException } from '@nestjs/common';
 import { HoneyBatchesService } from './honey-batches.service';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { WebhooksService } from '../webhooks/webhooks.service';
 
 describe('HoneyBatchesService', () => {
   let service: HoneyBatchesService;
@@ -50,9 +51,11 @@ describe('HoneyBatchesService', () => {
       honeyMeasurement: { create: jest.fn() },
     };
     auditLog = { record: jest.fn() };
+    const webhooks = { dispatch: jest.fn().mockResolvedValue(undefined) };
     service = new HoneyBatchesService(
       prisma as unknown as PrismaService,
       auditLog as unknown as AuditLogService,
+      webhooks as unknown as WebhooksService,
     );
   });
 

ApiCore-Backend/src/honey-batches/honey-batches.service.ts

@@ -1,6 +1,7 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { WebhooksService } from '../webhooks/webhooks.service';
 import { HoneyBatchStatus } from '../../generated/prisma';
 import { CreateHoneyBatchDto } from './dto/create-honey-batch.dto';
 import { CreateHoneyMeasurementDto } from './dto/create-honey-measurement.dto';
@@ -27,6 +28,7 @@ export class HoneyBatchesService {
   constructor(
     private readonly prisma: PrismaService,
     private readonly auditLog: AuditLogService,
+    private readonly webhooks: WebhooksService,
   ) {}
 
   async findAll(filter: HoneyBatchFilter = {}) {
@@ -59,7 +61,9 @@ export class HoneyBatchesService {
       userId: actingUserId,
       afterData: honeyBatch,
     });
-    return this.findById(honeyBatch.id);
+    const created = await this.findById(honeyBatch.id);
+    await this.webhooks.dispatch('batch.created', created);
+    return created;
   }
 
   async addMeasurement(