Router::connect/connect_password did a blocking std TcpStream::connect
with no timeout, inline on the tokio runtime. Against a router that
stayed behind when its node moved networks (framework-pt, 2026-08-15),
every dashboard poll of openwrt.get-status parked a worker thread for
the OS connect timeout (~2 min) — overlapping polls stalled unrelated
RPCs for 25s+ at a time, sessions timed out, and TOTP codes expired
before the backend verified them.
- bounded_tcp(): 5s connect timeout + 30s read/write timeouts on the
session socket, shared by both connect paths.
- openwrt.get-status runs its SSH exchange on spawn_blocking, so even a
slow router can only slow its own tile, never the API.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
