refactor: remove debug output for mtime and format last modified timestamp

tasks/download-image.yml

@@ -33,15 +33,9 @@
   changed_when: false
   failed_when: not debian_img_final.stat.exists or debian_img_final.stat.size == 0
 
-- name: Debug mtime type
-  debug:
-    msg: |
-      mtime={{ debian_img_final.stat.mtime }} ({{ debian_img_final.stat.mtime | type_debug }})
-      {{ debian_img_final.stat.mtime | int | strftime('%Y-%m-%d %H:%M:%S') }}
-
 - name: "[IMAGE] Display image info"
   ansible.builtin.debug:
     msg: |
       Image cached at: {{ debian_image_path }}
       Size: {{ debian_img_final.stat.size | int / 1024 / 1024 / 1024 | round(2) }} GB
-      Last modified: {{ debian_img_final.stat.mtime | int | strftime('%Y-%m-%d %H:%M:%S') }}
+      Last modified: {{ '%Y%m%d-%H%M%S' | strftime(debian_img_final.stat.mtime) }}