feat: add async rerank

[hanxiao]

No description provided.

[codecov]

Codecov Report

Merging #701 (8031f45) into main (12d33c4) will increase coverage by 0.76%.
The diff coverage is 87.50%.

@@            Coverage Diff             @@
##             main     #701      +/-   ##
==========================================
+ Coverage   77.38%   78.15%   +0.76%     
==========================================
  Files          12       12              
  Lines         942      943       +1     
==========================================
+ Hits          729      737       +8     
+ Misses        213      206       -7     

Flag	Coverage Δ
cas	78.15% <87.50%> (+0.76%)	⬆️

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Impacted Files	Coverage Δ
client/clip_client/client.py	86.81% <75.00%> (+3.94%)	⬆️
client/clip_client/__init__.py	100.00% <100.00%> (ø)
server/clip_server/__init__.py	100.00% <100.00%> (ø)
server/clip_server/executors/clip_torch.py	86.73% <100.00%> (ø)

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