`bootc` install doesn't work with `skopeo` `docker-daemon://` source-imgrefs

Not sure exactly why, all of this is running within a container with bootc and all directories necessary are mapped to the container because running `skopeo` manually works fine.

This works fine
```bash
skopeo copy docker-daemon:bootc:latest oci-archive:/output/bootc.tar:bootc:latest
bootc install to-disk --disable-selinux --composefs-backend --allow-missing-verity --bootloader systemd \
--via-loopback /output/bootable.img --filesystem ext4 --wipe \
--source-imgref oci-archive:/output/bootc.tar:bootc:latest \
--karg console=tty0 --karg console=ttyS0,115200 --karg selinux=0
```

This fails
```bash
bootc install to-disk --disable-selinux --composefs-backend --allow-missing-verity --bootloader systemd \
--via-loopback /output/bootable.img --filesystem ext4 --wipe \
--source-imgref docker-daemon:bootc:latest \
--karg console=tty0 --karg console=ttyS0,115200 --karg selinux=0
```
with
```
error: Installing to disk: Getting container info: failed to invoke method GetBlob: Unknown blob sha256:529a7c28bf7fe83341ce9296a990df37a497e58a900cbedccdd814b6a52d6a45
```

So I'm assuming it is a `bootc` issue. Docker registry works (`docker://ghcr.io/jmarrero/ubuntu-bootc:latest`) but not `docker-daemon`.

The following are bind mounted
```
-v /var/lib/docker:/var/lib/docker \
-v /var/lib/containerd:/var/lib/containerd \
-v /var/run/docker.sock:/var/run/docker.sock \
```

Start at the `bootc install to-disk` entry point and reproduce the difference between the working `oci-archive:` source-imgref and the failing `docker-daemon:` source-imgref inside the container. Check the behavior with the listed Docker and containerd mounts, and use the reported `GetBlob` unknown-blob error to verify that the docker-daemon source can be installed successfully.

Written by the indexing model from the issue text.