More request metrics

[DmitriyMusatkin]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 89.50%. Comparing base (1762f83) to head (7cb8d55).

Files with missing lines	Patch %	Lines
source/s3_client.c	30.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #530      +/-   ##
==========================================
- Coverage   89.57%   89.50%   -0.07%     
==========================================
  Files          21       21              
  Lines        6541     6565      +24     
==========================================
+ Hits         5859     5876      +17     
- Misses        682      689       +7     

Files with missing lines	Coverage Δ
source/s3_meta_request.c	91.29% <100.00%> (+0.07%)	⬆️
source/s3_request.c	95.27% <100.00%> (+0.11%)	⬆️
source/s3_client.c	91.23% <30.00%> (-0.53%)	⬇️

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