fix: disable Twenty multi-workspace to prevent subdomain redirect loop

Multi-workspace mode caused crm.rspace.online to redirect to
admin-crm.crm.rspace.online which doesn't exist. Space-level tenancy
is handled by rSpace's per-space API tokens instead.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deploy/twenty-crm/docker-compose.yml

@@ -38,11 +38,7 @@ services:
       - SIGN_IN_PREFILLED=false
       - IS_BILLING_ENABLED=false
       - TELEMETRY_ENABLED=false
-      # ── Multi-workspace ──
-      - IS_MULTIWORKSPACE_ENABLED=true
-      - IS_WORKSPACE_CREATION_LIMITED_TO_SERVER_ADMINS=true
-      - DEFAULT_SUBDOMAIN=admin-crm
-      - FRONT_DOMAIN=rspace.online
+      - IS_MULTIWORKSPACE_ENABLED=false
     volumes:
       - twenty-ch-server-data:/app/.local-storage
     labels:
@@ -81,11 +77,7 @@ services:
       - STORAGE_LOCAL_PATH=.local-storage
       - SERVER_URL=https://crm.rspace.online
       - TELEMETRY_ENABLED=false
-      # ── Multi-workspace ──
-      - IS_MULTIWORKSPACE_ENABLED=true
-      - IS_WORKSPACE_CREATION_LIMITED_TO_SERVER_ADMINS=true
-      - DEFAULT_SUBDOMAIN=admin-crm
-      - FRONT_DOMAIN=rspace.online
+      - IS_MULTIWORKSPACE_ENABLED=false
     volumes:
       - twenty-ch-server-data:/app/.local-storage
     networks: