Inconsistent naming of columns between ERIO and Base functions

[atmorling]

As you can see in the spec change it looks like I'm referring to two different columns,
in working through the fix for this I had to trace through the workflow to figure out what happens to the column name:

get_subjectgroup_observations returns with extra__subject__name
process_relocations turns extra__subject__name into name
relocations_to_trajectory re-adds extra so from name to extra__name

To me this highlights the need for a rethink of our column naming in ecoscope core and something to look at with a refactor of the base Relocs and Traj objects, if not sooner...

Originally posted by @atmorling in https://github.com/wildlife-dynamics/ecoscope-workflows/issues/425#issuecomment-2474464825