feat: agentic model support MaxTokens

[mrh997]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.73%. Comparing base (603cc7e) to head (9567514).
⚠️ Report is 1 commits behind head on release/agentic_model.

Additional details and impacted files

@@                    Coverage Diff                    @@
##           release/agentic_model     #703      +/-   ##
=========================================================
- Coverage                  79.94%   79.73%   -0.22%     
=========================================================
  Files                        132      132              
  Lines                      13409    13306     -103     
=========================================================
- Hits                       10720    10609     -111     
- Misses                      1826     1839      +13     
+ Partials                     863      858       -5     

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