feat(export): Bestandsbuch für Tierarzneimittel nach Art. 108 VO (EU) 2019/6

- Treatment records supplier, purchase proof and prescribing vet, and
  keeps the apiary the colony stood at on the treatment day.
- Holder name and address in site settings (never in public output;
  regression test in public.service.spec).
- treatment-log.pdf: one sheet per apiary, identical treatments grouped,
  missing mandatory fields printed as FEHLT, uncertain locations marked.
- Shared PDF table helpers extracted from the record card.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

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

@@ -106,4 +106,33 @@ describe('PublicService', () => {
       tiktok: null,
     });
   });
+
+  it('never exposes the holder name or address kept for the Bestandsbuch', async () => {
+    siteSettings.get.mockResolvedValue({
+      youtubeUrl: null,
+      instagramUrl: null,
+      tiktokUrl: null,
+      websiteUrl: null,
+      holderName: 'Nick Muster',
+      holderAddress: 'Musterweg 3, 86450 Altenmünster',
+    });
+    prisma.bottlingBatch.findUnique.mockResolvedValueOnce({
+      lotNumber: 'WH-2026-001',
+      date: new Date('2026-08-20'),
+      bestBeforeDate: new Date('2028-08-20'),
+      jarSize: 500,
+      product: null,
+      honeyBatch: {
+        honeyType: null,
+        waterContent: null,
+        extraction: { date: null, harvests: [] },
+      },
+    });
+
+    const result = await service.findBatchByLot('WH-2026-001');
+
+    const serialized = JSON.stringify(result);
+    expect(serialized).not.toContain('Nick Muster');
+    expect(serialized).not.toContain('Musterweg');
+  });
 });