fix: error propagation in chat completions

[AlpinDale]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @AlpinDale, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses an issue with error propagation in chat completions by standardizing the format of HTTP exception responses. It modifies the http_exception_handler to wrap error messages, types, and codes within a dedicated ErrorInfo object, which is then used to construct the ErrorResponse. This ensures that API consumers receive a consistent and well-defined error structure when an HTTPException occurs.

Highlights

• Error Response Structure: The pull request refactors the error response structure for HTTP exceptions, encapsulating error details within an ErrorInfo object.
• Consistent Error Propagation: This change ensures that HTTP exceptions are propagated with a standardized and consistent error format, improving API reliability.

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[gemini-code-assist]

Code Review

This pull request correctly fixes a bug in the http_exception_handler. The change ensures that HTTPExceptions are properly serialized into the OpenAI-compatible error format by wrapping the error details in an ErrorInfo object before creating the ErrorResponse. This is a good fix that improves the robustness and correctness of error handling in the API server.