feat(exchange): update trading pairs

[panapol-p]

What have you changed and why?

This PR updates the pairs.json file to include newly supported trading pairs.
These additions ensure the exchange integration can recognize and handle more markets for order placement, data retrieval, and validation.

Summary of changes

• Added new trading pairs to pairs.json
• Verified format and schema consistency
• Ensured backward compatibility with existing pairs

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.41%. Comparing base (83d272f) to head (d59b95c).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #393   +/-   ##
=======================================
  Coverage   31.41%   31.41%           
=======================================
  Files          37       37           
  Lines        4189     4189           
=======================================
  Hits         1316     1316           
  Misses       2794     2794           
  Partials       79       79           

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[rodrigo-brito]

Thank you