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/prisma/migrations/20261016100500_t6_compliance_settings_row/migration.sql

@@ -0,0 +1,9 @@
+-- T6 migration 6/6: the ComplianceSettings singleton row exists from the
+-- start. The label check reads the net-quantity digit rules from it and fails
+-- closed when the row is missing, so no legal value lives in the code. The
+-- column defaults (digit rules, notice switches) fill the row; the owner has
+-- to check them (ARCHITECTURE).
+
+INSERT INTO "ComplianceSettings" ("id", "updatedAt")
+VALUES ('singleton', now())
+ON CONFLICT ("id") DO NOTHING;