Added additional_messages

[sabuhigr]

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Describe the change
Added new feature on openai run (additiona_messages)

Provide OpenAI documentation link
Provide a relevant API doc from https://platform.openai.com/docs/api-reference

Describe your solution
Its very small changes to run request.

Tests
Tested new changes, and it successfully added messages.

Additional context

Issue: #908

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.69%. Comparing base (774fc9d) to head (f92a942).
Report is 77 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #914      +/-   ##
==========================================
+ Coverage   98.46%   98.69%   +0.23%     
==========================================
  Files          24       26       +2     
  Lines        1364     1761     +397     
==========================================
+ Hits         1343     1738     +395     
- Misses         15       16       +1     
- Partials        6        7       +1     

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