Obs package needs adjustment so that processCcd can run properly.

Image assembly, construction of master cals and application of isr was fixed in DM-10253. We now need to get to the point where the rest of processCcd can run.

We need to deal with the the fact that we only have Ra and Dec in the headers, and manually insert enough information for a nominal wcs to be created, create a filterMap for the refObjLoader so that the wacky filters we have here map to something in the reference catalogues, and find out how well that's going to work for matching.

We may also need to create tweaks for the installation of the initial PSF. Early results indicated that some exposures were failing on the number of cosmic ray pixels detected, which was temporarily worked around by upping the allowed number from 10k to 100k, but I suspect (without having looked), that this is happening because the nominal (or measured) PSF is too large, and is causing the spectra (which are long and thin) to be seen as objects sharper than a PSF, and are then flagged as CR pixels. This obviously needs to be fixed.

"Working" astrometry is in quotes as it is not obvious until work has gone further how well we will and should be able to get matches on dispersed images, given the pollution from the spectra. I also don't know where these lie on the sky, and whether they will overlap with the reference catalogs that we have.

Also deal with any number of other mysteries along the way