Lets bend (examples/cuda-fanout/gpu-worker.lsp) run multiple worker
processes behind a single listening port. Each worker calls
tcp-listen on the same port; the kernel distributes incoming
connections across the bound sockets.
Foxhop production use case: 2 bend workers per GPU host (3090 + 4090)
to consume the .ready queue at 2x throughput without an external
load balancer.