Proxy openai chat completions endpoint

[robot-ci-heartex]

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• Proxy openai chat completions endpoint label-studio-sdk#511

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.37%. Comparing base (f4a509c) to head (ae11aae).
⚠️ Report is 17 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #8182       +/-   ##
============================================
+ Coverage    66.29%   78.37%   +12.07%     
============================================
  Files          505      216      -289     
  Lines        34204    18027    -16177     
  Branches      8837        0     -8837     
============================================
- Hits         22677    14128     -8549     
+ Misses       11524     3899     -7625     
+ Partials         3        0        -3     

Flag	Coverage Δ
lsf-e2e	?
lsf-integration	?
lsf-unit	?
pytests	78.37% <ø> (?)

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