Benchmark LLM rankers using GAUC

[zhenghaoz]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 73.68421% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.62%. Comparing base (e6fbf89) to head (e7233c0).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
master/rest.go	63.88%	8 Missing and 5 partials ⚠️
common/reranker/client.go	90.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1176      +/-   ##
==========================================
- Coverage   72.69%   72.62%   -0.07%     
==========================================
  Files          87       87              
  Lines       16079    16054      -25     
==========================================
- Hits        11689    11660      -29     
- Misses       3199     3205       +6     
+ Partials     1191     1189       -2     

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