feat: BROS-338: Use local proxy to user LLMs [REBASE FIRST]

[robot-ci-heartex]

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Please ensure that all linked upstream Pull Requests are merged before proceeding with this one.

• feat: BROS-338: Use local proxy to user LLMs [REBASE FIRST] label-studio-sdk#525

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.37%. Comparing base (79494e7) to head (75d23d2).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #8198      +/-   ##
===========================================
+ Coverage    69.25%   78.37%   +9.12%     
===========================================
  Files          721      216     -505     
  Lines        52235    18031   -34204     
  Branches      8837        0    -8837     
===========================================
- Hits         36175    14132   -22043     
+ Misses       16057     3899   -12158     
+ Partials         3        0       -3     

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

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