feat(permission): seed 154 PermissionDefs + 7 builtin roles + matrix + lookups + tenant auto-seed

- 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

apps/tenant/apps.py

@@ -5,3 +5,8 @@ class TenantConfig(AppConfig):
     default_auto_field = "django.db.models.BigAutoField"
     name = "apps.tenant"
     label = "tenant"
+
+    def ready(self):
+        from apps.tenant import signals  # noqa: F401
+
+        signals._register()