[rozyczko]

• Updated the docstring in FitRun (in fitting.py) to explicitly state that the object is frozen, but its pooled and per_dataset dictionaries are mutable and shared, and must be copied before modification.
• Expanded the docstring for the last_fit property in project.py to reinforce that the returned fit record is read-only history and to reference the updated documentation in FitRun.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.69%. Comparing base (9b5cb2b) to head (b60fa3d).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #445   +/-   ##
========================================
  Coverage    95.69%   95.69%           
========================================
  Files           60       60           
  Lines         7294     7294           
========================================
  Hits          6980     6980           
  Misses         314      314           

Flag	Coverage Δ
integration	38.93% <ø> (ø)
unittests	95.69% <ø> (ø)

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Files with missing lines	Coverage Δ
src/easyreflectometry/fitting.py	98.44% <ø> (ø)
src/easyreflectometry/project.py	95.19% <ø> (ø)

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