The default dimensions of voxelization should be based upon input mesh

Currently the default values are ad hoc constants, but the default values should be extracted from the mesh's coordinates.

Start by locating the voxelization implementation and the code that defines its current default dimension constants. Trace how the input mesh coordinates are available, then verify that the defaults are derived from those coordinates and add or update focused tests showing the resulting dimensions for representative meshes.

Written by the indexing model from the issue text.