Add the ability to pass in extra body params for the OpenAI pathway, similar to the extra query params that were added

[markurtz]

No description provided.

[nm-red-hat-upstream-automation-bot]

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[Copilot]

Pull Request Overview

This pull request adds support for passing extra body parameters to the OpenAI pathway, mirroring the existing extra query parameters approach.

• Updates the SyntheticDatasetCreator signature for improved formatting in synthetic.py.
• Introduces an extra_body parameter in OpenAI client initialization and integrates it into text and chat completions payload building in backend/openai.py.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/guidellm/dataset/synthetic.py	Adjusted method signature formatting for clarity in parameter ordering.
src/guidellm/backend/openai.py	Added extra_body support by extending initialization and payload methods.

Comments suppressed due to low confidence (1)

src/guidellm/backend/openai.py:410

• [nitpick] Consider refactoring the condition by iterating over a list of endpoint types to improve maintainability as additional types may be supported in the future.

if (CHAT_COMPLETIONS in self.extra_body or MODELS in self.extra_body or TEXT_COMPLETIONS in self.extra_body):

[MeganEFlynn]

Works for setting temperature and max tokens!