Module cache 

Caching layer for semantic analysis and AST parsing

This module provides caching mechanisms to improve performance by:

• Caching parsed ASTs for unchanged documents
• Caching semantic analysis results
• Caching symbol indexes
• Tracking cache hit rates and performance metrics

Structs

AstCache

AST cache for parsed syntax trees

CacheMetrics

Performance metrics for caching

SemanticCache

Semantic analysis cache

SymbolIndexCache

Symbol index cache

Functions

hash_input

Compute hash of input string