Function run_vm_io_async 

pub async fn run_vm_io_async(input: &str) -> InterpreterResult

Run an IO program (peer networking and/or tcp.lg sockets) on the BYTECODE VM (single task, no channels): drive the resumable VM and service each VmBlock::Net*/VmBlock::Tcp through the shared NetInbox/TcpRegistry — the SAME seams the tree-walker uses — so networking and sockets run byte-identically on both tiers. The cross-tier locks prove they agree.