f59eb79 now fully bench-verified: the fleet SPA renders on both the VM
(virtio-gpu) and the 820 (i915), so the i915 DMC/GuC firmware loads on real
hardware and the firmware keep-list is validated end-to-end. The two later
commits (nss-mdns drop, omit_drivers + keep-list tightening) don't touch i915,
so render should be safe, but still need their own build+boot.