Module registration 

Registration of Python actors, strategies, controllers, and execution algorithms.

Every Python component reaches the trader through one of the add_python_* methods here, so the sequence each component needs (component clock, register, global registries, lifecycle tracking) is expressed once. Registering in the global registries retains the component’s Python wrapper, so a caller of that path cannot forget the wrapper. A [PyExecutionAlgorithm] registers through the native path instead, so Trader::add_py_execution_algorithm_instance retains its wrapper directly and is the only place that has to.