r/base: Install python3-libdnf5

Fedora 41 uses _dnf5_ by default.  Being written in C, its Python API is
an optional feature that needs to be installed separately.

roles/base/tasks/main.yml

@@ -6,6 +6,13 @@
   tags:
   - always
 
+- name: ensure python3-libdnf5 is installed
+  command:
+    dnf5 install -y python3-libdnf5
+  args:
+    creates: /usr/share/licenses/python3-libdnf5
+  when: ansible_pkg_mgr == 'dnf5'
+
 - name: ensure selinux python bindings are installed
   package:
     name: '{{ selinux_python_libs }}'