Logging epochs

[MatteoWohlrapp]

Added functionality to add the epoch when the model was selected to the results file.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.71429% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 95.13%. Comparing base (3a3e3b9) to head (d5c03c8).

Files	Patch %	Lines
domainlab/algos/msels/a_model_sel.py	91.66%	1 Missing ⚠️
domainlab/algos/msels/c_msel_val.py	50.00%	1 Missing ⚠️
domainlab/algos/observers/b_obvisitor.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #796 +/- ##
==========================================
- Coverage 95.16% 95.13% -0.03% 
==========================================
Files 127 127 Lines 5002 5015 +13 ==========================================
+ Hits 4760 4771 +11 - Misses 242 244 +2 

Flag	Coverage Δ
unittests	95.13% <85.71%> (-0.03%)	⬇️

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[smilesun]

could you fix the codacy as well?

As a general rule, we do not have to fix those coday issues which requires too much time, but for empty space trailing etc we should fix them