chore: fill missing docstrings

[bwanglzu]

No description provided.

[codecov]

Codecov Report

Merging #162 (fcd03c5) into main (fddc57d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #162   +/-   ##
=======================================
  Coverage   84.90%   84.90%           
=======================================
  Files          24       24           
  Lines        1166     1166           
=======================================
  Hits          990      990           
  Misses        176      176           

Flag	Coverage Δ
finetuner	84.90% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
finetuner/labeler/__init__.py	0.00% <ø> (ø)
finetuner/tailor/__init__.py	95.23% <ø> (ø)
finetuner/tailor/keras/__init__.py	86.00% <ø> (ø)
finetuner/tailor/paddle/__init__.py	96.33% <ø> (ø)
finetuner/tailor/pytorch/__init__.py	97.19% <ø> (ø)
finetuner/tuner/__init__.py	81.81% <ø> (ø)
finetuner/tuner/keras/losses.py	100.00% <ø> (ø)
finetuner/tuner/paddle/losses.py	100.00% <ø> (ø)
finetuner/tuner/pytorch/losses.py	100.00% <ø> (ø)

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[tadejsv]

LGTM