fix(proxy): handle consumed responses

[pi0]

In node, when new response is manually constructed (unenv) _data is set and it will be consumed. This PR handles this situation using internal API.

[codecov]

Codecov Report

Merging #321 (340b0e7) into main (4d1459c) will decrease coverage by 0.13%.
The diff coverage is 45.45%.

@@            Coverage Diff             @@
##             main     #321      +/-   ##
==========================================
- Coverage   66.74%   66.62%   -0.13%     
==========================================
  Files          24       24              
  Lines        2481     2481              
  Branches      289      290       +1     
==========================================
- Hits         1656     1653       -3     
- Misses        825      828       +3     

Impacted Files	Coverage Δ
src/utils/proxy.ts	85.18% <45.45%> (-2.78%)	⬇️

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