fix: #935 (log request validation errors)

[miparnisari]

Description

Close #918 and #935

Now, all unary requests that are invalid (for example, a missing parameter) will be logged in the server.

Testing

With the tests in this PR + manual tests:

Logs in Main vs this PR:

Traces in this PR:

Response headers in this PR

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (d706e2c) 82.28% compared to head (7fd051a) 82.43%.

Files	Patch %	Lines
pkg/middleware/logging/logging.go	90.91%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1236      +/-   ##
==========================================
+ Coverage   82.28%   82.43%   +0.15%     
==========================================
  Files          83       83              
  Lines        9587     9588       +1     
==========================================
+ Hits         7888     7903      +15     
+ Misses       1344     1335       -9     
+ Partials      355      350       -5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.