refactor: better types

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• documentation update
• typo fix
• metadata update

Motivation / Use-Case

Also added TODO for the next major release, we don't make a redirect when make /public/file.ext request and when file.ext is the file, it is a rare case, but will be great to fix it in future

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.25%. Comparing base (1f54424) to head (40c4a5f).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1801   +/-   ##
=======================================
  Coverage   96.25%   96.25%           
=======================================
  Files          13       13           
  Lines         695      695           
  Branches      206      206           
=======================================
  Hits          669      669           
  Misses         25       25           
  Partials        1        1           

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