Module connection

Connection management for Unix socket communication with the pool server.

Provides:

• Fresh connection per request (prevents response mixing under high concurrency)
• Semaphore-based concurrency limiting
• RAII connection guards for automatic cleanup

Structs

ConnectionPool

Connection manager for Unix socket connections.

PoolConnection

A single connection to the pool server (single-use, not pooled)

PooledConnection

RAII wrapper that returns connection to pool on drop