Fix for tomography superres binning determination

[stephen-riggs]

Match this to the SPA logic

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 34.50%. Comparing base (3e47841) to head (819f691).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #670      +/-   ##
==========================================
+ Coverage   33.94%   34.50%   +0.56%     
==========================================
  Files          92       92              
  Lines       11183    11230      +47     
  Branches     1472     1480       +8     
==========================================
+ Hits         3796     3875      +79     
+ Misses       7258     7226      -32     
  Partials      129      129              

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