//! VMM coordinator. Owns the lifecycle of a single VM: build →
//! activate vCPUs → run → shut down.
//!
//! Submodules:
//! builder — VmmBuilder (construct VM from config)
//! coord — cross-vCPU coordination
//! resources — VmResources (config bag)
//! runner — main run loop
//! snapshot — capture/restore
//! vstate — vCPU state on macOS HVF
//! worker — pool-worker dispatcher
//! tls — TLS termination front-door
//! vsock_mux — vsock front-door (Unix / TCP / SCM_RIGHTS handoff)