Add debug logging for deduplicated queries

[gammazero]

Also, added comment about why request context is not used in inProgressRequestStatus.

Would deduplicated requests be worth tracking with a prometheus gauge?

[codecov]

Codecov Report

Attention: Patch coverage is 70.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 60.38%. Comparing base (cdefbf2) to head (da0117e).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...uting/providerquerymanager/providerquerymanager.go	70.00%	2 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##             main     #729      +/-   ##
==========================================
+ Coverage   60.33%   60.38%   +0.05%     
==========================================
  Files         244      244              
  Lines       31017    31026       +9     
==========================================
+ Hits        18713    18734      +21     
+ Misses      10633    10621      -12     
  Partials     1671     1671              

Files with missing lines	Coverage Δ
...uting/providerquerymanager/providerquerymanager.go	87.86% <70.00%> (-0.65%)	⬇️

... and 13 files with indirect coverage changes

[hsanjuan]

Sure why not