feat: add upstream string to resolve error

[ThinkChaos]

Fixes #872

[codecov]

Codecov Report

Base: 93.15% // Head: 93.07% // Decreases project coverage by -0.09% ⚠️

Coverage data is based on head (1f25e45) compared to base (d64b399).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #902      +/-   ##
===============================================
- Coverage        93.15%   93.07%   -0.09%     
===============================================
  Files               42       42              
  Lines             4950     4950              
===============================================
- Hits              4611     4607       -4     
- Misses             268      271       +3     
- Partials            71       72       +1     

Impacted Files	Coverage Δ
resolver/upstream_resolver.go	89.01% <100.00%> (ø)
resolver/query_logging_resolver.go	95.62% <0.00%> (-2.92%)	⬇️

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