A zero-copy key-value store in Rust

To provide a key-value store with consistent latency independent from keys and values sizes we need to eliminate copies from the key-value store's datapath while still ensuring reliable delivery of responses to requests. We leverage several feature of the Rust programming language to achieve zero-copy reliable delivery of key-value store responses through the R2P2 protocol while providing a much higher level of safety than these type of systems usually do.