feat: improve gateway response error logging

[roderickvd]

Description

Enhance error handling when parsing gateway responses fails by:

• Adding trace logging of JSON structure when type parsing fails
• Adding error logging with raw response body when JSON parsing fails

Related Issues

This will help diagnose #31 and similar issues in the future.

Implementation Details

When strongly typed JSON deserialization fails, the code attempts to:

1. Deserialize as generic JSON for structural debugging
2. If that fails, log the raw response body as a trace message

Testing

Tested locally by simulating JSON deserialization errors.

Due Diligence

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• I have linked any related issues or feature requests.
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• I have performed cross-platform testing if possible.
• I have updated the CHANGELOG.md file with a summary of my changes under the "Unreleased" section.
• I have kept the pull request as a draft until it is ready for review (if applicable).
• I have read and understood the Contributing guidelines.