- data migration apps/permission_def/0002_seed_permission_defs: 154 PermissionDef rows in public schema
- service apps.permission.services.seed_default_roles: 7 builtin roles + 154x7 RolePermission matrix
- service apps.setting.services.seed_default_lookups: LookupGroup/LookupItem defaults per DATA_MODEL_SETTING.md sec 2.3
- apps.tenant.signals: post_save Tenant handler auto-seeds new tenants inside schema_context, errors logged not raised
- apps.tenant.apps.ready() registers the signal