feat: T6 wave 3 – treatment books from lot, label print lock, restricted zone, authority notices

- Treatments book their dose from a medicine lot (delta booking on edit,
  bulk all-or-nothing, idempotent); Bestandsbuch columns from the lot,
  FEHLT exactly where treatmentLogGaps reports a gap; Bestandsbuch export
  needs veterinary-medicines:read.
- Label printing: 409 LABEL_PARTICULARS_MISSING on gaps, proof print with
  watermark, PRINT audit before the PDF, check endpoints; digit rules only
  from the seeded ComplianceSettings row (fail closed).
- Restricted zone (Berlin day): create, update, move, merge and CSV import
  blocked inside an active restriction; override with reason and
  compliance:manage, audited, never stored on the colony; split, harvest
  and dissolve stay free; restriction details only with compliance:read.
- Authority notices: settings, herd snapshot, registration/herd change/TSK
  notices with one open draft per kind under the settings lock.
- Label check refinements (geometric reading order, number|unit pairs).
- ARCHITECTURE.md §12.6–12.8, Annahmen 71–77; spec §5.6 Berlin day.

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

ApiCore-Backend/src/apiary-restrictions/apiary-restrictions-null-contract.spec.ts

@@ -0,0 +1,22 @@
+import {
+  describeNullContracts,
+  NullContract,
+} from '../common/validation/null-contract.spec-helper';
+import { UpdateColonyDto } from '../colonies/dto/update-colony.dto';
+import { UpdateApiaryRestrictionDto } from './dto/update-apiary-restriction.dto';
+
+const contracts: Record<string, NullContract> = {
+  UpdateApiaryRestrictionDto: {
+    dto: UpdateApiaryRestrictionDto,
+    notNull: ['disease', 'startsOn'],
+    clearable: ['endsOn', 'authority', 'reference', 'notes'],
+  },
+  // The reason is only read, never stored: null means "no override".
+  UpdateColonyDto: {
+    dto: UpdateColonyDto,
+    notNull: ['status'],
+    clearable: ['restrictionOverrideReason'],
+  },
+};
+
+describeNullContracts('Apiary restriction DTOs', contracts);