Require invited login and private downloads for the company pilot

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a07ff8-19d0-7820-b4d0-1353833cb7fc

conftest.py

@@ -8,3 +8,10 @@ def mitarbeiter(db):
     return Mitarbeiter.objects.create_user(
         username='testuser', password='testpass', first_name='Test', last_name='User'
     )
+
+
+@pytest.fixture
+def admitted_client(client, mitarbeiter):
+    """Domain workflow tests act as a member; the standard client stays anonymous."""
+    client.force_login(mitarbeiter)
+    return client