- poller.py: start lock_refresher() IMMEDIATELY after acquiring the lock,
before the startup jitter and restart-storm deferral. Those sleeps can
together exceed LOCK_TTL (restart defer is up to POLL_SWEEP_INTERVAL), so
with the refresher started afterward the lock could expire mid-deferral and
a second poller could begin sweeping concurrently — the exact hardware-storm
risk this design prevents.
- hwgate.py: clamp POLL_CONCURRENCY to 1 unless POLL_ALLOW_UNSAFE_CONCURRENCY
is set (fragile SAS hardware; >1 can drop expanders). Warn either way.
- build.sh: keep backward-compatible — a non-target first arg is treated as
the commit message (./build.sh "msg" still works), known targets select
web|poller|all.