2.50.03: Add counts to refrigerants; fix interiors carbon intensities bug;

This is a patch release which makes a number of small changes:

For the detailed refrigerants schema, we now allow users to pass a
count
parameter (assumed to be 1). The refrigerant charge is the quantity per piece of equipment. If there was no count parameter declared in a model previously, it's assumed to be 1.
Previously, there was a JSON serialization error affecting the
carbon-intensities/interiors-assemblies
endpoint. This has been addressed.
For assemblies where we migrated the
reuse
parameter to
condition
, this update provides backwards compatibility for API users who are passing float values for reuse.

No change in calculation.