feat(backend): Datenexport-Modul (Modul 21)

ExportModule mit GET /export/colonies.csv, /export/honey-batches.csv,
/export/:entity.json (apiaries/colonies/queens/honey-batches/tasks)
und /export/:report.pdf (honey-batch-traceability via pdfkit).
Ausserdem fehlendes "typecheck"-Skript in package.json ergaenzt
(von CLAUDE.md dokumentiert, war aber nicht vorhanden).

ApiCore-Backend/test/export.e2e-spec.ts

@@ -0,0 +1,134 @@
+import { INestApplication } from '@nestjs/common';
+import * as bcrypt from 'bcryptjs';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { PrismaService } from '../src/prisma/prisma.service';
+import { createTestApp } from './utils/create-test-app';
+import { login } from './utils/api';
+
+describe('Export (e2e)', () => {
+  let app: INestApplication<App>;
+  let prisma: PrismaService;
+  const beekeeperEmail = `export-e2e-beekeeper-${Date.now()}@example.com`;
+  const password = 'SuperSecret123!';
+  let beekeeperId: string;
+  let beekeeperToken: string;
+  let apiaryId: string;
+  let colonyId: string;
+  let harvestId: string;
+  let extractionId: string;
+  let honeyBatchId: string;
+
+  beforeAll(async () => {
+    app = await createTestApp();
+    prisma = app.get(PrismaService);
+
+    const passwordHash = await bcrypt.hash(password, 12);
+    const beekeeper = await prisma.user.create({
+      data: {
+        email: beekeeperEmail,
+        passwordHash,
+        name: 'Beekeeper',
+        role: 'BEEKEEPER',
+      },
+    });
+    beekeeperId = beekeeper.id;
+    beekeeperToken = (await login(app, beekeeperEmail, password)).accessToken;
+
+    const apiary = await prisma.apiary.create({
+      data: { name: `Stand ${Date.now()}` },
+    });
+    apiaryId = apiary.id;
+    const colony = await prisma.colony.create({
+      data: {
+        code: `V-${Date.now()}`,
+        apiaryId,
+        colonyType: 'PRODUCTION_COLONY',
+      },
+    });
+    colonyId = colony.id;
+    const harvest = await prisma.harvest.create({
+      data: { apiaryId, date: new Date(), userId: beekeeperId },
+    });
+    harvestId = harvest.id;
+    await prisma.harvestColony.create({ data: { harvestId, colonyId } });
+    const extraction = await prisma.extraction.create({
+      data: { date: new Date(), userId: beekeeperId },
+    });
+    extractionId = extraction.id;
+    await prisma.extractionHarvest.create({
+      data: { extractionId, harvestId },
+    });
+    const honeyBatch = await prisma.honeyBatch.create({
+      data: { batchNumber: `HC-${Date.now()}`, extractionId, amount: 20 },
+    });
+    honeyBatchId = honeyBatch.id;
+  });
+
+  afterAll(async () => {
+    await prisma.honeyBatch.deleteMany({ where: { id: honeyBatchId } });
+    await prisma.extractionHarvest.deleteMany({ where: { extractionId } });
+    await prisma.extraction.deleteMany({ where: { id: extractionId } });
+    await prisma.harvestColony.deleteMany({ where: { harvestId } });
+    await prisma.harvest.deleteMany({ where: { id: harvestId } });
+    await prisma.colony.deleteMany({ where: { id: colonyId } });
+    await prisma.apiary.deleteMany({ where: { id: apiaryId } });
+    await prisma.refreshToken.deleteMany({ where: { userId: beekeeperId } });
+    await prisma.auditLog.deleteMany({ where: { userId: beekeeperId } });
+    await prisma.user.deleteMany({ where: { id: beekeeperId } });
+    await app.close();
+  });
+
+  it('exports colonies as CSV', async () => {
+    const response = await request(app.getHttpServer())
+      .get('/api/v1/export/colonies.csv')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(200);
+    expect(response.headers['content-type']).toContain('text/csv');
+    expect(response.text.split('\n')[0]).toContain('code');
+    expect(response.text).toContain(colonyId);
+  });
+
+  it('exports honey batches as CSV', async () => {
+    const response = await request(app.getHttpServer())
+      .get('/api/v1/export/honey-batches.csv')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(200);
+    expect(response.text).toContain(honeyBatchId);
+  });
+
+  it('exports colonies as JSON', async () => {
+    const response = await request(app.getHttpServer())
+      .get('/api/v1/export/colonies.json')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(200);
+    const body = response.body as { id: string }[];
+    expect(body.some((colony) => colony.id === colonyId)).toBe(true);
+  });
+
+  it('rejects an unsupported JSON entity with 400', () => {
+    return request(app.getHttpServer())
+      .get('/api/v1/export/bogus.json')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(400);
+  });
+
+  it('exports the honey batch traceability report as PDF', async () => {
+    const response = await request(app.getHttpServer())
+      .get(
+        `/api/v1/export/honey-batch-traceability.pdf?honeyBatchId=${honeyBatchId}`,
+      )
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(200);
+    expect(response.headers['content-type']).toContain('application/pdf');
+    const pdfBody = response.body as Buffer;
+    expect(pdfBody.subarray(0, 4).toString('latin1')).toBe('%PDF');
+  });
+
+  it('rejects the traceability report without honeyBatchId with 400', () => {
+    return request(app.getHttpServer())
+      .get('/api/v1/export/honey-batch-traceability.pdf')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(400);
+  });
+});