QSOE/L: The first spawn from real storage

The last post ended with QSOE/L still in the emulator, and the next job named in plain words: carry the image across to the Unmatched and find out which of my QEMU assumptions were lies. The image went across. It got further than I'd have guessed — far enough to bring up the PCIe root, raise devb-nvme over real DesignWare MSI, spin up the Samsung NVMe, and mount an on-disk filesystem off it — and…