feat: add in rate limits

[chaz-polymarket]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 89.54545% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.86%. Comparing base (a280f32) to head (5a530b2).
⚠️ Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
src/rate_limit.rs	78.26%	20 Missing ⚠️
src/clob/client.rs	97.02%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   83.84%   86.86%   +3.02%     
==========================================
  Files          31       31              
  Lines        4592     4546      -46     
==========================================
+ Hits         3850     3949      +99     
+ Misses        742      597     -145     

Flag	Coverage Δ
rust	86.86% <89.54%> (+3.02%)	⬆️

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