Homogeneous freezing example + FIX for mark updated attributes in homogeneous freezing and thaw + expanded unit test of record freezing temperature

[tluettm]

No description provided.

[slayoo]

let's add a smoke test, e.g. checking the Tfz histograms

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.50%. Comparing base (73ccc3d) to head (843620c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1682   +/-   ##
=======================================
  Coverage   86.50%   86.50%           
=======================================
  Files         412      412           
  Lines       10372    10375    +3     
=======================================
+ Hits         8972     8975    +3     
  Misses       1400     1400           

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