fix: improve docstring and add log messages

[raphael0202]

No description provided.

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (d9660c6) 57.57% compared to head (b928f96) 57.53%.

Files	Patch %	Lines
robotoff/cli/main.py	0.00%	3 Missing ⚠️
robotoff/logos.py	50.00%	2 Missing ⚠️
robotoff/app/api.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1310      +/-   ##
==========================================
- Coverage   57.57%   57.53%   -0.04%     
==========================================
  Files          79       79              
  Lines        7785     7793       +8     
==========================================
+ Hits         4482     4484       +2     
- Misses       3303     3309       +6     

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