Enforce partner client ownership and partner-scoped imports

app/modules/clients/__init__.py

@@ -1,29 +1,17 @@
-"""Clients module.
+"""Clients module with lazy router exports.
 
-Routers are exposed lazily so importing ``app.modules.clients.models`` does
-not initialise the clients API, UI, importer, and related modules. This keeps
-the existing ``api_router`` and ``ui_router`` public exports while preventing
-circular imports with client groups.
+Importing client models must not initialise the complete UI/import stack.
 """
-
 from __future__ import annotations
-
 from typing import Any
 
 __all__ = ["api_router", "ui_router"]
 
-
 def __getattr__(name: str) -> Any:
     if name == "api_router":
         from .api import router
-
         return router
-
     if name == "ui_router":
         from .ui import router
-
         return router
-
-    raise AttributeError(
-        f"module {__name__!r} has no attribute {name!r}"
-    )
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")