(feat) Cleaned up the markets initialization logic

[aarmoa]

• Cleaned up the markets initialization logic

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (4fcdeba) 72.97% compared to head (c318d0a) 73.00%.

Files	Patch %	Lines
pyinjective/async_client.py	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #294      +/-   ##
==========================================
+ Coverage   72.97%   73.00%   +0.03%     
==========================================
  Files          48       48              
  Lines        3404     3397       -7     
  Branches      303      302       -1     
==========================================
- Hits         2484     2480       -4     
+ Misses        839      837       -2     
+ Partials       81       80       -1     

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