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.ts

@@ -0,0 +1,76 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+import { AuditLogService } from '../audit/audit-log.service';
+import { Apiary } from '../../generated/prisma';
+import { CreateApiaryDto } from './dto/create-apiary.dto';
+import { UpdateApiaryDto } from './dto/update-apiary.dto';
+
+@Injectable()
+export class ApiariesService {
+  constructor(
+    private readonly prisma: PrismaService,
+    private readonly auditLog: AuditLogService,
+  ) {}
+
+  async findAll(): Promise<Apiary[]> {
+    return this.prisma.apiary.findMany({ orderBy: { name: 'asc' } });
+  }
+
+  async findById(id: string): Promise<Apiary> {
+    const apiary = await this.prisma.apiary.findUnique({ where: { id } });
+    if (!apiary) {
+      throw new NotFoundException('Apiary not found');
+    }
+    return apiary;
+  }
+
+  async create(dto: CreateApiaryDto, actingUserId: string): Promise<Apiary> {
+    const apiary = await this.prisma.apiary.create({ data: { ...dto } });
+    await this.auditLog.record({
+      entityType: 'Apiary',
+      entityId: apiary.id,
+      action: 'CREATE',
+      userId: actingUserId,
+      afterData: apiary,
+    });
+    return apiary;
+  }
+
+  async update(
+    id: string,
+    dto: UpdateApiaryDto,
+    actingUserId: string,
+  ): Promise<Apiary> {
+    const before = await this.findById(id);
+    const apiary = await this.prisma.apiary.update({
+      where: { id },
+      data: { ...dto },
+    });
+    await this.auditLog.record({
+      entityType: 'Apiary',
+      entityId: id,
+      action: 'UPDATE',
+      userId: actingUserId,
+      beforeData: before,
+      afterData: apiary,
+    });
+    return apiary;
+  }
+
+  async deactivate(id: string, actingUserId: string): Promise<Apiary> {
+    const before = await this.findById(id);
+    const apiary = await this.prisma.apiary.update({
+      where: { id },
+      data: { status: 'INACTIVE', deactivatedAt: new Date() },
+    });
+    await this.auditLog.record({
+      entityType: 'Apiary',
+      entityId: id,
+      action: 'DEACTIVATE',
+      userId: actingUserId,
+      beforeData: before,
+      afterData: apiary,
+    });
+    return apiary;
+  }
+}