[OPEN-7544] Adds support to OpenAI Chat Completions Parse call

[viniciusdsmello]

Pull Request

Summary

Adds comprehensive tracing support for OpenAI Chat Completions parse method, enabling monitoring of structured outputs (Pydantic models, JSON Schema).

Changes

• Implemented tracing for synchronous and asynchronous client.chat.completions.parse calls.
• Added parse_structured_output_data to correctly extract and serialize structured outputs.

Context

OpenAI's parse method is designed for generating structured outputs, which differs from the unstructured text returned by the create method. This PR ensures that applications leveraging the parse method for structured data extraction can also benefit from Openlayer's tracing capabilities, capturing the structured output and relevant metadata for monitoring and debugging.

Testing

• Unit tests

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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