Avoid the Alpine boot stall caused by kernel ip= autoconfig running before
virtio_net is available.
Split runtime and image-build boot args so managed VMs boot without kernel
network autoconfig, inject a static guest network config plus bootstrap
script into the runtime overlay, and keep image builds on the old path for
compatibility with existing base images.
Preserve executable bits when patching guest files into ext4 images and add
coverage for the new boot-arg split and guest network config generation.
Validated with go test ./..., a rebuilt Alpine image, and a fresh alp-fast
create/ssh check that brought vm.start down to about 2.7s.
Stop relying on ad hoc rootfs handling by adding image promotion, managed work-seed fingerprint metadata, and lazy self-healing for older managed images after the first create.
Rebuild guest images with baked SSH access, a guest NIC bootstrap, and default opencode services, and add the staged Void kernel/initramfs/modules workflow so void-exp uses a matching Void boot stack.
Replace the opaque blocking vm.create RPC with a begin/status flow that prints live stages in the CLI while still waiting for vsock health and opencode on guest port 4096.
Validate with GOCACHE=/tmp/banger-gocache go test ./... and live void-exp create/delete smoke runs.
