refactor: align backend with company-site-member schema and system-level RBAC groups

backend/app/models/__init__.py

@@ -1,7 +1,25 @@
 from app.models.api_client import ApiClient
-from app.models.member_organization import MemberOrganization
-from app.models.organization import Organization
+from app.models.company import Company
+from app.models.module import Module
 from app.models.permission import Permission
+from app.models.permission_group import PermissionGroup
+from app.models.permission_group_member import PermissionGroupMember
+from app.models.permission_group_permission import PermissionGroupPermission
+from app.models.site import Site
+from app.models.system import System
 from app.models.user import User
+from app.models.user_scope_permission import UserScopePermission
 
-__all__ = ["ApiClient", "MemberOrganization", "Organization", "Permission", "User"]
+__all__ = [
+    "ApiClient",
+    "Company",
+    "Module",
+    "Permission",
+    "PermissionGroup",
+    "PermissionGroupMember",
+    "PermissionGroupPermission",
+    "Site",
+    "System",
+    "User",
+    "UserScopePermission",
+]