- Updated `resolveJsonSchemaRefs` to prevent `` and `definitions` from appearing in the resolved output, ensuring compatibility with LLM APIs.
- Improved `normalizeJsonSchema` to strip vendor extension fields (e.g., `x-*` prefixed keys) and leftover ``/`definitions` blocks, enhancing schema normalization for Google/Gemini API.
- Added comprehensive tests to validate the stripping of ``, vendor extensions, and proper normalization across various schema structures.