- Added support for <tool_call><tool><name>...</name><arguments>...</arguments></tool></tool_call> format
- Added support for multiple tool calls in <tool_call> wrapper
- Added same patterns to ApexBig50Parser for direct handling
- Added exception handling for formatter.format_full() to prevent TypeError
- Added fallback response when formatted_response is None
- ToolCallParser now serves as fallback for all specific model parsers