HST ramp model and enabling calibrated spectra - v2

[kevin218]

This PR is in response to requested changes to #534. I'm not sure why my push created a new PR, but here we are. Once this gets approved, I'll delete the other PR.

[codecov-commenter]

Codecov Report

Merging #544 (5c6909e) into main (5c585fb) will decrease coverage by 0.69%. The diff coverage is 2.87%.

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@@            Coverage Diff             @@
##             main     #544      +/-   ##
==========================================
- Coverage   57.68%   57.00%   -0.69%     
==========================================
  Files          92       94       +2     
  Lines       11145    11282     +137     
==========================================
+ Hits         6429     6431       +2     
- Misses       4716     4851     +135     

Impacted Files	Coverage Δ
...urve_fitting/differentiable_models/HSTRampModel.py	0.00% <0.00%> (ø)
...ureka/S5_lightcurve_fitting/models/HSTRampModel.py	0.00% <0.00%> (ø)
src/eureka/S3_data_reduction/s3_reduce.py	88.09% <16.66%> (-1.49%)	:arrow_down:
src/eureka/S5_lightcurve_fitting/s5_fit.py	66.35% <37.50%> (-0.72%)	:arrow_down:

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[kevin218]

@taylorbell57 In case you didn't get notified, I addressed the remaining two comments.

[taylorbell57]

Thanks @kevin218, for some reason this time I did get emails about your commits, but better safe than sorry. I'm completely occupied with OWL this week, but this is on my to-do list for next week