feat(server): add rank endpoint

[hanxiao]

No description provided.

[codecov]

Codecov Report

Merging #694 (7a8e4d5) into main (3bd7464) will increase coverage by 1.98%.
The diff coverage is 88.37%.

@@            Coverage Diff             @@
##             main     #694      +/-   ##
==========================================
+ Coverage   78.86%   80.84%   +1.98%     
==========================================
  Files          11       11              
  Lines         809      830      +21     
==========================================
+ Hits          638      671      +33     
+ Misses        171      159      -12     

Flag	Coverage Δ
cas	80.84% <88.37%> (+1.98%)	⬆️

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Impacted Files	Coverage Δ
server/clip_server/model/clip_onnx.py	96.00% <ø> (+14.18%)	⬆️
server/clip_server/executors/clip_torch.py	90.90% <86.48%> (+2.57%)	⬆️
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_onnx.py	88.73% <100.00%> (+0.16%)	⬆️
server/clip_server/model/clip.py	86.33% <100.00%> (ø)
server/clip_server/model/model.py	65.25% <0.00%> (+3.08%)	⬆️

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