feat(backend): Bienenstaende-Modul (Modul 2)

ApiariesModule: CRUD + Deactivate. Lesen fuer alle authentifizierten
Rollen offen, Schreiben (Anlegen/Aendern/Deaktivieren) auf ADMIN und
BEEKEEPER beschraenkt (Lastenheft §3.2: Imker verwaltet Bienenstaende).
Audit-Log-Eintraege bei Create/Update/Deactivate ueber AuditLogService.

4 Unit-Tests + 4 e2e-Tests (inkl. Rollenpruefung READONLY vs. BEEKEEPER),
Lint, Typecheck und Build gruen.

ApiCore-Backend/src/apiaries/apiaries.service.spec.ts

@@ -0,0 +1,78 @@
+import { NotFoundException } from '@nestjs/common';
+import { ApiariesService } from './apiaries.service';
+import { PrismaService } from '../prisma/prisma.service';
+import { AuditLogService } from '../audit/audit-log.service';
+
+describe('ApiariesService', () => {
+  let service: ApiariesService;
+  let prisma: {
+    apiary: {
+      findMany: jest.Mock;
+      findUnique: jest.Mock;
+      create: jest.Mock;
+      update: jest.Mock;
+    };
+  };
+  let auditLog: { record: jest.Mock };
+
+  const existingApiary = {
+    id: 'apiary-1',
+    name: 'Heimstand',
+    status: 'ACTIVE',
+    deactivatedAt: null,
+  };
+
+  beforeEach(() => {
+    prisma = {
+      apiary: {
+        findMany: jest.fn(),
+        findUnique: jest.fn(),
+        create: jest.fn(),
+        update: jest.fn(),
+      },
+    };
+    auditLog = { record: jest.fn().mockResolvedValue(undefined) };
+    service = new ApiariesService(
+      prisma as unknown as PrismaService,
+      auditLog as unknown as AuditLogService,
+    );
+  });
+
+  it('findById throws NotFoundException when missing', async () => {
+    prisma.apiary.findUnique.mockResolvedValue(null);
+    await expect(service.findById('missing')).rejects.toBeInstanceOf(
+      NotFoundException,
+    );
+  });
+
+  it('create persists the apiary and records an audit entry', async () => {
+    prisma.apiary.create.mockResolvedValue(existingApiary);
+
+    const result = await service.create({ name: 'Heimstand' }, 'user-1');
+
+    expect(result).toEqual(existingApiary);
+    expect(auditLog.record).toHaveBeenCalledWith(
+      expect.objectContaining({
+        entityType: 'Apiary',
+        action: 'CREATE',
+        userId: 'user-1',
+      }),
+    );
+  });
+
+  it('deactivate sets status to INACTIVE and records an audit entry', async () => {
+    prisma.apiary.findUnique.mockResolvedValue(existingApiary);
+    prisma.apiary.update.mockResolvedValue({
+      ...existingApiary,
+      status: 'INACTIVE',
+      deactivatedAt: new Date(),
+    });
+
+    const result = await service.deactivate('apiary-1', 'user-1');
+
+    expect(result.status).toBe('INACTIVE');
+    expect(auditLog.record).toHaveBeenCalledWith(
+      expect.objectContaining({ entityType: 'Apiary', action: 'DEACTIVATE' }),
+    );
+  });
+});