feat(integrations): openai-agents: add usage and response model reporting for chat and invoke_agent spans

[constantinius]

Issues

Closes https://linear.app/getsentry/issue/TET-1457/py-openai-agents-attributes-missing

[linear]

TET-1457 Py OpenAI Agents - attributes missing

[codecov]

Codecov Report

❌ Patch coverage is 89.65517% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.99%. Comparing base (7b7ea33) to head (6a1d6b3).
⚠️ Report is 10 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...y_sdk/integrations/openai_agents/patches/models.py	86.66%	0 Missing and 2 partials ⚠️
...k/integrations/openai_agents/spans/invoke_agent.py	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5157      +/-   ##
==========================================
+ Coverage   83.97%   83.99%   +0.01%     
==========================================
  Files         180      181       +1     
  Lines       18222    18251      +29     
  Branches     3235     3239       +4     
==========================================
+ Hits        15302    15330      +28     
  Misses       1929     1929              
- Partials      991      992       +1     

Files with missing lines	Coverage Δ
...ry_sdk/integrations/openai_agents/_context_vars.py	100.00% <100.00%> (ø)
..._sdk/integrations/openai_agents/spans/ai_client.py	100.00% <100.00%> (ø)
...k/integrations/openai_agents/spans/invoke_agent.py	87.50% <87.50%> (-0.38%)	⬇️
...y_sdk/integrations/openai_agents/patches/models.py	89.18% <86.66%> (-1.72%)	⬇️

... and 6 files with indirect coverage changes

[alexander-alderman-webb]

out of curiosity, why do we need to capture the raw response model?

[constantinius]

This is the only place I found to get the response model. OpenAI Agents does not expose this, we only get the request model, but not the response.