Http middleware

[veqryn]

Create an http middleware for collecting log attributes from down-chain and final handlers.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.39496% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 92.81%. Comparing base (6bdf1a0) to head (6601b62).

Files	Patch %	Lines
internal/test/handler.go	67.85%	7 Missing and 2 partials ⚠️
http/middleware.go	90.90%	4 Missing and 2 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #21      +/-   ##
==========================================
- Coverage   93.86%   92.81%   -1.06%     
==========================================
  Files           6        9       +3     
  Lines         212      306      +94     
==========================================
+ Hits          199      284      +85     
- Misses          9       16       +7     
- Partials        4        6       +2     

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