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/configuration/tasks/selinux.yml

@@ -3,9 +3,9 @@
   when: is_rhel | bool
   block:
     - name: Fix SELinux by pre-labeling the filesystem before first boot
-      when: os | lower in ['almalinux', 'rhel8', 'rhel9', 'rhel10', 'rocky'] and selinux | bool
+      when: os in ['almalinux', 'rocky', 'rhel'] and selinux | bool
       ansible.builtin.command: >
-        {{ chroot_command }} /mnt /sbin/setfiles -v -F
+        {{ chroot_command }} /sbin/setfiles -v -F
         -e /dev -e /proc -e /sys -e /run
         /etc/selinux/targeted/contexts/files/file_contexts /
       register: configuration_setfiles_result