Include motor movements in the fit.

[daniloefl]

Adds motor positions given to the fit, so that motor positions are compensated in the calibration.

[codecov]

Codecov Report

❌ Patch coverage is 91.42857% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.78%. Comparing base (04f52d2) to head (be1b3c3).

Files with missing lines	Patch %	Lines
src/extra/applications/grating.py	91.42%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #515      +/-   ##
==========================================
+ Coverage   74.37%   74.78%   +0.40%     
==========================================
  Files          35       35              
  Lines        6971     7001      +30     
==========================================
+ Hits         5185     5236      +51     
+ Misses       1786     1765      -21     

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