z_offset_mm and z_scaling have been removed in the refactor

[mkaca]

I don't see anything that replaces this functionality of the 2 parameters. It is also not clear to me WHY these were removed in the first place.
z_offset_mm
z_scaling
I use these 2 parameters in older versions of the ros_astra_camera and have multiple astra cameras calibrated with their respective z_offset and z_scaling parameters.

There are still clear remnants of it in your config file.

Some input, explanation, and migration support would be appreciated

Cheers