fix(config): enable dictionary merge for scoped overrides

inventory_libvirt_example.yml

@@ -14,8 +14,8 @@ all:
       hosts:
         web01.local:
           ansible_host: 192.168.122.20
-          filesystem: "ext4"
           system:
+            filesystem: "ext4"
             type: "virtual"
             os: "debian"
             version: "12"
@@ -54,9 +54,9 @@ all:
                 toolkit: "nftables"
         db01.local:
           ansible_host: 192.168.122.21
-          filesystem: "xfs"
           rhel_iso: "/var/lib/libvirt/images/rhel-9.4-x86_64-dvd.iso"
           system:
+            filesystem: "xfs"
             type: "virtual"
             os: "rhel"
             version: "9"
@@ -95,8 +95,8 @@ all:
                 toolkit: "nftables"
         compute01.local:
           ansible_host: 192.168.122.22
-          filesystem: "btrfs"
           system:
+            filesystem: "btrfs"
             type: "virtual"
             os: "fedora"
             version: "41"