feat(vm-provision): provision FreeBSD and OpenBSD guests

create_vm_from_cloud_init(guest_os=...) with GUEST_AGENTS from
napalm-device-types 3.0 (QEMU_GUEST_AGENTS: Linux, FreeBSD, OpenBSD). An
unknown guest_os is refused before anything is created. Found on FreeBSD
15.1 and OpenBSD 7.9 cloud images (NetOrk/netork#793):

- OS type `other` for the BSDs. OpenBSD's qemu-ga only works over ISA
  serial, and only as the second port: the image keeps its console on
  com0, so the VM gets `serial0: socket` next to `agent: 1,type=isa`.
- A BSD guest gets a network-config v2 snippet of its own
  (`cicustom: user=...,network=...`, MAC read back from net0). FreeBSD's
  nuageinit fails on the v1 Proxmox generates and then skips runcmd,
  which starts the guest agent. Linux keeps Proxmox's own.
- Packed images (FreeBSD's .qcow2.xz) are unpacked on the node after the
  packed file's checksum is verified; only the unpacked file is cached.
  download-url unpacks ISOs only, so they always take the SSH path.

Fixed on the way:
- get_vm_status skipped loopback only when it was called `lo`; OpenBSD's
  agent lists `lo0` first, so 127.0.0.1 would have been the VM's IP.
  Loopback is now recognised by its address.
- destroy_vm read cicustom after deleting the VM, when its config was gone,
  so snippets stayed on the node; it now reads them first and removes all
  of them (#15).

pyproject.toml

@@ -25,7 +25,7 @@ classifiers = [
 requires-python = ">=3.9"
 dependencies = [
     "napalm>=5.0.0",
-    "napalm_device_types>=2.4.0",
+    "napalm_device_types>=3.0.0",
     "paramiko>=5.0.0",  # CVE-2026-44405; imported directly for SSH fallback (driver.py)
     "proxmoxer>=2.0.0",
     "netaddr>=0.9.0",