fix: enhance Nextcloud upgrade process with detailed output and failure handling

nextcloud/update_nextcloud_v2.yml

@@ -350,8 +350,38 @@
           environment:
             SSHPASS: "{{ vm_password }}"
           register: nc_upgrade
+          changed_when: nc_upgrade.rc == 0
+          failed_when: false
           no_log: true
 
+        - name: Nextcloud | Show upgrade output
+          ansible.builtin.debug:
+            msg: |
+              Upgrade return code: {{ nc_upgrade.rc }}
+
+              STDOUT:
+              {{ nc_upgrade.stdout | default('') | trim }}
+
+              STDERR:
+              {{ nc_upgrade.stderr | default('') | trim }}
+
+        - name: Nextcloud | Fail when upgrade command failed
+          ansible.builtin.assert:
+            that:
+              - nc_upgrade.rc == 0
+            fail_msg: |
+              Nextcloud upgrade failed.
+
+              Return code:
+              {{ nc_upgrade.rc }}
+
+              STDOUT:
+              {{ nc_upgrade.stdout | default('') | trim }}
+
+              STDERR:
+              {{ nc_upgrade.stderr | default('') | trim }}
+            quiet: true
+
         - name: Nextcloud | Show upgrade output
           ansible.builtin.debug:
             msg: |