`PhononWorkChain`: the `conv_thr` when using protocols refers to unitcell
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bastonero commented
When using get_builder_from_protocol, the threshold per atom in
scf:
meta_parameters:
conv_thr_per_atom: 1.0e-15
will be used referring to the unitcell, not the supercell. This is due to the fact that we use straight the method of PwBaseWorkChain. A rescale would be desirable, e.g. by using the determinant of the supercell matrix.