feat: add subset alg for instances

[longXboy]

feat: add subset alg for instances

[codecov-commenter]

Codecov Report

Merging #2613 (3401ffe) into main (6174475) will decrease coverage by 0.25%.
The diff coverage is 62.16%.

❗ Current head 3401ffe differs from pull request most recent head a1264c8. Consider uploading reports for the commit a1264c8 to get more accurate results

@@            Coverage Diff             @@
##             main    #2613      +/-   ##
==========================================
- Coverage   85.18%   84.93%   -0.26%     
==========================================
  Files          88       88              
  Lines        3841     3870      +29     
==========================================
+ Hits         3272     3287      +15     
- Misses        396      409      +13     
- Partials      173      174       +1     

Impacted Files	Coverage Δ
transport/http/client.go	84.21% <20.00%> (-1.28%)	⬇️
transport/grpc/client.go	88.04% <40.00%> (-2.77%)	⬇️
transport/grpc/resolver/discovery/resolver.go	66.12% <42.85%> (-1.73%)	⬇️
transport/grpc/resolver/discovery/builder.go	94.73% <50.00%> (-5.27%)	⬇️
transport/http/resolver.go	96.34% <100.00%> (+0.39%)	⬆️
internal/context/context.go	97.01% <0.00%> (-2.99%)	⬇️

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