- Introduced `NormalizeClaudeToolInputSchema` in `util` package to standardize tool input schemas for compatibility with Claude.
- Replaced local `normalizeClaudeToolInputSchema` implementations in translator functions with the new utility method.
- Improved handling of schema validation, union elimination, and property merging.
- Removed redundant code in response and chat-completions translators, streamlining schema normalization logic.
Closes: #4428