40_drivers.target referenced only pcid-spawner-initfs, so the initfs
driver-manager service (staged, gated, with its storage TOML and the
binary already copied into initfs/bin) never entered the boot graph.
The target now lists driver-manager-initfs first and keeps
pcid-spawner-initfs as the gated fallback — the initfs cutover is
complete. Also correct the initfs-storage.toml header comment (the
content is driver-manager format).