Clean up operation description generation

[gsheni]

• Fixes Clean up PredictionProblemEvaluator #91

[codecov]

Codecov Report

Patch coverage: 88.88% and project coverage change: +0.76% 🎉

Comparison is base (dee4470) 89.47% compared to head (4c1ed3f) 90.24%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #118      +/-   ##
==========================================
+ Coverage   89.47%   90.24%   +0.76%     
==========================================
  Files          26       25       -1     
  Lines         903      892      -11     
==========================================
- Hits          808      805       -3     
+ Misses         95       87       -8     

Files Changed	Coverage Δ
trane/core/__init__.py	100.00% <ø> (ø)
trane/core/cutoff_strategy.py	100.00% <ø> (ø)
trane/ops/op_base.py	95.83% <ø> (-2.17%)	⬇️
trane/core/prediction_problem.py	83.33% <70.58%> (+3.92%)	⬆️
trane/ops/aggregation_ops.py	100.00% <100.00%> (ø)
trane/ops/filter_ops.py	100.00% <100.00%> (ø)

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