Improve error messages for Rust client and Try with variant

[GabrielBianconi]

Fix #3519

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Important

Improved error message handling for Python and Rust clients by simplifying Python test assertions and enhancing Rust error parsing logic.

• Python Client:
  • Simplified error message assertions in test_client.py by removing JSON formatting from expected error messages.
• Rust Client:
  • Updated TensorZeroError::Http in lib.rs to attempt JSON parsing of error messages before using raw text.
  • Modified check_http_response() and http_inference_stream() to extract error from JSON response if available, otherwise use raw body.
  • Adjusted try_adjust_tool_call_arguments() to handle tool call arguments based on gateway version.

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[Copilot]

Pull Request Overview

This PR improves error messages for the Rust client by standardizing error field naming and enhancing error message formatting. The changes focus on renaming the text field to message in the TensorZeroError::Http variant and implementing JSON error parsing for better error handling.

• Renamed text field to message in TensorZeroError::Http variant for consistency
• Enhanced error message formatting with conditional display logic
• Added JSON error parsing to extract structured error messages from API responses

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
clients/rust/src/lib.rs	Updated error struct field name, improved error message formatting, and added JSON error parsing
clients/python/src/lib.rs	Updated field reference from text to message in error conversion
tensorzero-core/tests/e2e/rate_limiting.rs	Updated test assertions to use message field instead of text

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[Copilot]

Pull Request Overview

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

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