Replace eval() in python_object_properties with getattr (hardening)

[fhightower]

Problem

The property-introspection helper in d8s_python/python_data.py:224 (and the following few lines) builds and evals a string to read/call attributes:

string_to_eval_as_property = "python_object.{}".format(i)
eval_result = eval(string_to_eval_as_property)
...
eval(string_to_eval_as_function)

i comes from python_object.__dir__(), not external input, so this isn't exploitable today. Still worth removing the eval pattern since it's introspection over attribute names, which getattr handles directly.

Fix

eval_result = getattr(python_object, i)
if callable(eval_result):
    try:
        print(f"{i}: {eval_result()}")
    except TypeError:
        print(f"{i}: {eval_result}")