docs: Add documentation for caseinfo and utils (#199)

[gromdimon]

No description provided.

[codecov]

Codecov Report

Merging #200 (c107599) into main (8848960) will increase coverage by 0.00%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #200   +/-   ##
=======================================
  Coverage   80.10%   80.11%           
=======================================
  Files         126      127    +1     
  Lines        3760     3761    +1     
  Branches      843      843           
=======================================
+ Hits         3012     3013    +1     
  Misses        690      690           
  Partials       58       58           

Files	Coverage Δ
backend/app/api/api_v1/endpoints/utils.py	100.00% <100.00%> (ø)
backend/app/core/auth.py	86.04% <100.00%> (ø)
backend/app/etc/__init__.py	100.00% <ø> (ø)
backend/app/etc/utils.py	88.23% <ø> (ø)

... and 1 file with indirect coverage changes