Function validate_tool_path 

pub fn validate_tool_path(path: &str) -> Result<(), SynwireError>

Validate a path for safety (no traversal, no null bytes, no absolute paths).

This is a defence-in-depth measure to prevent tools from accessing files outside their intended sandbox.

Errors

Returns SynwireError::Tool with ToolError::PathTraversal if the path:

• Contains null bytes
• Contains .. path traversal components
• Starts with / or \ (absolute path)
• Contains Windows-style drive letters (e.g. C:)