fix: add missing MCPManager() instantiation in test

The test_sync_from_config_registers_new_servers test was setting up
mocks but never actually creating an MCPManager instance, so the
sync_from_config() method was never called and register() was never
invoked.

Added MCPManager() call inside the with block to trigger the
initialization flow that calls sync_from_config().

Author: mpfaffenberger

tests/mcp/test_manager_extended.py

@@ -744,6 +744,9 @@ def test_sync_from_config_registers_new_servers(self):
             ),
             patch("code_puppy.mcp_.manager.ServerStatusTracker"),
         ):
+            # Actually instantiate the manager to trigger sync_from_config!
+            MCPManager()
+
             # Verify register was called
             assert mock_registry_instance.register.called