Incorrect z_position of g4_tracks

On main branch, g4camp 0.1.20

In output .h5 file, z position of a primary particle in the 'Primary' dataset and z positions in the 'g4_tracks_0' dataset differs.

To recreate issue, try this command: python3 -m ntsim.ntsim --generator ToyGen

Then in 'Primary' dataset we have init position 0,0,0 and in 'g4_tracks_0' dataset 0,0,580. I expect, we should have the same z positions in all datasets, or maybe I am missing something