feat: central RTC write modes (DISABLED/DRY_RUN/APPROVAL/ENABLED), R4 suggestion-only, preview/approval, per-record rollback, bulk blocker upsert; 1.2.0

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

deploy/hub/.env.example

@@ -1,5 +1,5 @@
 # GTI Fiscal Hub — production environment (copy to .env, never commit .env)
-GTI_FISCAL_VERSION=1.1.9
+GTI_FISCAL_VERSION=1.2.0
 
 # REQUIRED. URL-safe secret (used inside a connection URL): openssl rand -hex 24
 POSTGRES_PASSWORD=

deploy/hub/docker-compose.prod.yml

@@ -36,7 +36,7 @@ services:
     build:
       context: ../..
       dockerfile: central/Dockerfile
-    image: gti-fiscal-hub:${GTI_FISCAL_VERSION:-1.1.9}
+    image: gti-fiscal-hub:${GTI_FISCAL_VERSION:-1.2.0}
     restart: unless-stopped
     depends_on:
       postgres: