Agent teams: move timed benchmarks off a loaded dev laptop with a single host-queue owner

When many coding agents share one laptop, its load average can reach dozens, making any timing they take there noise. Keep the laptop for builds and unit tests, and route every timed run to dedicated hosts (a stopped warm VM that boots in ~20 s, spare cores on a shared server, plain cheap VMs for benches that need no licensed tools). Make one agent the queue owner, and require a fixed request format: kit + hashes, stub-test record, cores + peak RSS, time-sum from past records, needs-vendor-tools yes/no, quiet-host vs contended-OK, outputs and labels. Nothing runs without a slot line. On the warm VM, run several sub-kits concurrently on disjoint physical cores (reserve core 0), each with its own timeout and leftover-process check, one stop/start per batch; quiet-host A/Bs get a solo batch.