Memory Sidecar v3.5.1 Hardens Agent-Agnostic Memory Store

Memory Sidecar v3.5.1 focuses on operational hardening with a revamped write-ahead log for data integrity, sharded locks reducing tail latency by 35%, and mandatory TLS 1.3. The release switches to MessagePack serialization, cutting payload size by 50% and improving p99 read latency by 40%. It also introduces at-rest encryption and a generational cache for hot data.