Module cache 

MindmapCache: Secure file loading and caching for recursive navigation

This module provides:

• Lazy loading and caching of mindmap files
• Secure path resolution with validation (prevents directory traversal)
• File size checks (max 10MB by default)
• Integration with NavigationContext for cycle detection

Structs

CacheStats

Cache statistics

MindmapCache

Manages loading and caching of mindmap files with security validation