Modify saturation values in SPyFFI

[zkbt]

Modify the saturation levels to be 200,000 electrons per individual read, to be closer to lab tests.

While saturation should now fall under the purview of HTTM, it would be nice to preserve the capability for SPyFFI to produce perfectly calibrated imaging data. To so, we should leave in the option for saturate stars.

[xcthulhu]

Looks like the header is getting set here, to the 'SATURATE' key

SPyFFI/CCD.py

Line 157 in 4eab9ce

self.header['SATURATE'] = (

In HTTM, I believe this may be referred to as the full well parameter

https://github.com/TESScience/httm/blob/595528ece1c7f85f8daa536e8da3cc79cd3b1347/httm/data_structures/metadata.py#L109

As you can see, it is set to 170000.

I will make sure that HTTM will look for SATURATE if its around to use in it's blooming model.