Experiment: Add breakpoint mvp

[philipp-seitz]

Run once with:

    storage.clean_graph_files()
    run_graph(storage, executor, graph, graph_inputs={"value": 1})
    # resume_graph(storage, executor)
    # print(read_outputs(graph, storage))

then after

    # storage.clean_graph_files()
    # run_graph(storage, executor, graph, graph_inputs={"value": 1})
    resume_graph(storage, executor)
    print(read_outputs(graph, storage))