Add variables to the smoke test

[kevinbackhouse]

The smoke test is currently failing with this error message:

** 🤖❗ Request Error: Error code: 400 - {'error': {'message': "Unsupported value: 'temperature' does not support 0 with this model. Only the default (1) value is supported.", 'type': 'invalid_request_error', 'param': 'temperature', 'code': 'unsupported_value'}}

The simplest solution is to set the MODEL_TEMP environment variable to 1.0. This PR allows us to change the value in the repo settings.

[Copilot]

Pull request overview

This PR adds configuration variables to the smoke test workflow to allow dynamic configuration of model temperature and API endpoint settings. The smoke test was failing because the default temperature of 0 is not supported by the model being tested, and this PR enables setting these values via repository variables.

Changes:

• Added MODEL_TEMP environment variable mapped to vars.SMOKETEST_TEMPERATURE repository variable
• Added AI_API_ENDPOINT environment variable mapped to vars.SMOKETEST_ENDPOINT repository variable

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.