SP-2453: Update rs_download_data to point to new movingObjects (2025-07-15) data

[rhiannonlynne]

kurucz_sun was not scaled properly

[yoachim]

Could consider adding a unit test for kurucz_sun.gz and the other files in there. Especially since there isn't much documentation on what those files are or where one might use them.

[rhiannonlynne]

Totally up for that, but do you mean just a unit test that unpacks the reflectance, multiplies by the kurucz_sun, and then calculates colors? Like in https://github.com/lsst/rubin_sim_notebooks/blob/main/photometry/solar_system_object_colors.ipynb but just for LSST?
(or I guess, at the start of the moving objects code, in order to calculate colors there)?

[yoachim]

Sure, just reading in the files, doing something simple with them and checking that the values are reasonable.