SymmetryData for structures is missing a few pydantic field descriptions

[Andrew-S-Rosen]

The returned entries are:

emmet/emmet-core/emmet/core/symmetry.py

Lines 156 to 166 in 47ae22c

	symmetry.update(
	{
	"source": "spglib",
	"symbol": sg.get_space_group_symbol(),
	"number": sg.get_space_group_number(),
	"point_group": sg.get_point_group_symbol(),
	"crystal_system": CrystalSystem(sg.get_crystal_system().title()),
	"hall": sg.get_hall(),
	"version": spglib.__version__,
	}
	)

However, I don't think source, hall, or version have an associated pydantic field description.