Direct mycelium runs and our pkexec spawns are both healthy
(sidecar logs show acquired routes streaming for 20+s). Yet our
reqwest poller can't reach 127.0.0.1:port after the first
successful request. Smoking gun: failure happens ~10s after the
first reply — exactly when an idle keep-alive connection would
have been reaped.
Disable pooling (pool_max_idle_per_host(0)) so every call opens a
fresh TCP connection. Loopback overhead is negligible (~50us per
request) and we're immune to server-side idle closes. Also pin
connect_timeout to 3s so a wedged half-open doesn't block for
the full 10s request timeout.
7981fc571c