Module cache 

Cache management and memory-mapped I/O

The cache module handles the .reflex/ directory structure:

• meta.db: Metadata, file hashes, and configuration (SQLite)
• tokens.bin: Compressed lexical tokens (binary)
• content.bin: Memory-mapped file contents (binary)
• trigrams.bin: Trigram inverted index (bincode binary)
• config.toml: Index settings (TOML text)

Structs

BranchInfo

Branch metadata information

CacheManager

Manages the Reflex cache directory

Constants

CACHE_DIR

Default cache directory name

CONFIG_TOML

HASHES_JSON

META_DB

File names within the cache directory

TOKENS_BIN