Implement pretune option to speed up AIR T.

[anarkiwi]

No description provided.

[codecov]

Codecov Report

Patch coverage: 75.00% and project coverage change: -0.06% ⚠️

Comparison is base (d8fce5e) 75.75% compared to head (65c98bf) 75.69%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #876      +/-   ##
==========================================
- Coverage   75.75%   75.69%   -0.06%     
==========================================
  Files          41       41              
  Lines        3460     3469       +9     
==========================================
+ Hits         2621     2626       +5     
- Misses        839      843       +4     

Files Changed	Coverage Δ
gamutrf/grscan.py	77.31% <71.42%> (-1.97%)	⬇️
gamutrf/scan.py	86.32% <100.00%> (+0.11%)	⬆️

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