refactor(vars): add system/hypervisor dict inputs

- Normalize new system_cfg + hypervisor_cfg and keep legacy vm_* and hypervisor_* aliases

- Support multiple system.disks (creation + optional mount + fstab generation)

- Add system_check safety role (production + existing system detection)

- Update README and example inventories

roles/partitioning/defaults/main.yml

@@ -51,7 +51,7 @@ partitioning_efi_mountpoint: >-
     if (partitioning_separate_boot | bool)
     else (
       '/boot/efi'
-      if is_rhel or (os | lower in ['debian11', 'debian12', 'debian13', 'ubuntu', 'ubuntu-lts'])
+      if is_rhel or (os in ['ubuntu', 'ubuntu-lts'] or (os == 'debian' and (os_version | string) in ['11', '12', '13']))
       else '/boot'
     )
   }}