Returns a dict of standalone engine model status.
Example: {'models': [{'class': 'ccfraud', 'name': 'z5', 'status': 'Running'}]}
Example: {'models': [{'class': 'postprocess', 'name': 'first-postprocess', 'status': 'Running'}, {'class': 'noopfloats', 'name': 'noopv1', 'status': 'Running'}, {'class': 'preprocess', 'name': 'first-preprocess', 'status': 'Running'}]}
Example: {"models": [{"class":"synerror", "name":"v1", "status":{"Error":"Python compile or runtime error [" File \"//tmp/.tmpk7mJpI/syntax_error.py\", line 1", " PLEASE CRASH HERE", " ^", "SyntaxError: invalid syntax"]"}}]}