Fix linting: replace pass with pytest.skip in placeholder tests

tests/security/test_auth_security.py

@@ -252,18 +252,20 @@ class TestSessionSecurity:
             assert initial_session != new_session
 
     @pytest.mark.asyncio
+    @pytest.mark.skip(reason="Requires session management implementation")
     async def test_concurrent_session_limit(self, client):
         """Test that users cannot have unlimited concurrent sessions."""
         # This would require creating multiple sessions
         # Placeholder for the test
-        pass
+        pytest.skip("Session concurrency limits not implemented")
 
     @pytest.mark.asyncio
+    @pytest.mark.skip(reason="Requires time manipulation or async wait")
     async def test_session_timeout(self, client):
         """Test that sessions expire after inactivity."""
         # Would need to manipulate time or wait
         # Placeholder showing the security principle
-        pass
+        pytest.skip("Session timeout testing not implemented")
 
 
 @pytest.mark.security