feat: T6 wave 2 – medicine book, document rights, label particulars, herd events

- Veterinary medicine catalogue, lots and append-only movement ledger
  (rest always computed; corrections as counter-bookings; inactive
  medicines take no new stock; unit must match on lot moves).
- Documents of medicine lots, authority notices and restrictions need the
  domain right on top of documents:* (403 before any lookup).
- Label particulars: pure checkLabel with six mandatory gaps and four
  warnings, AFM font metrics, Berlin-day dates, geometric reading order
  for split addresses, new master-data fields with row-locked updates.
- Herd events ColonyCreated, ColonyMoved, ApiaryChanged and
  TskReferenceDayReached (ids only, never forwarded to webhooks); CSV
  import emits ColonyCreated with audit.
- ARCHITECTURE.md §12 Compliance (T6), Annahmen 59–70.

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

ApiCore-Backend/src/label-templates/placeholder-keys.spec.ts

@@ -0,0 +1,16 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+import { PLACEHOLDER_KEYS } from './label-element.types';
+
+describe('PLACEHOLDER_KEYS', () => {
+  // The frontend compares its own list with this file.
+  it('the fixture file equals PLACEHOLDER_KEYS', () => {
+    const fixture: unknown = JSON.parse(
+      readFileSync(
+        join(__dirname, '../../test/fixtures/placeholder-keys.json'),
+        'utf8',
+      ),
+    );
+    expect(fixture).toEqual([...PLACEHOLDER_KEYS]);
+  });
+});