chore: minor Improvements to providerquerymanager

[gammazero]

Each of the first 5 commits is a stand-alone enhancement.

[codecov]

Codecov Report

Attention: Patch coverage is 93.10345% with 4 lines in your changes missing coverage. Please review.

Project coverage is 60.32%. Comparing base (8673560) to head (e2965ed).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...uting/providerquerymanager/providerquerymanager.go	93.10%	3 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##             main     #728      +/-   ##
==========================================
+ Coverage   60.31%   60.32%   +0.01%     
==========================================
  Files         244      244              
  Lines       31034    31015      -19     
==========================================
- Hits        18717    18711       -6     
+ Misses      10644    10633      -11     
+ Partials     1673     1671       -2     

Files with missing lines	Coverage Δ
...uting/providerquerymanager/providerquerymanager.go	89.18% <93.10%> (+2.20%)	⬆️

... and 6 files with indirect coverage changes

[hsanjuan]

LGTM... although I think the improvements may be not so minor ;)