- tag publish version for Si reconstruction
- Clean up BO states
- BO train_x/y transfer between engines for single job
- multi-GPU dispatcher
- template job sequences / yamls
- metric() function(s) for each ptycho engine
- fold_slice: load diffractions / hdf5 files; change only param per job
    - Possibly restructure PtychoEngine.__init__() to load data but not params