fix: streamline validation for Proxmox storage snippets support

tasks/preflight-checks.yml

@@ -159,28 +159,15 @@
 
 - name: "[PREFLIGHT] Ensure Proxmox storage supports snippets"
   block:
-    - name: "[PREFLIGHT] Read storage.cfg"
-      ansible.builtin.slurp:
-        src: /etc/pve/storage.cfg
-      register: storage_cfg_raw
-
-    - name: "[PREFLIGHT] Decode storage.cfg"
-      set_fact:
-        storage_cfg: "{{ storage_cfg_raw.content | b64decode }}"
-
-    - name: "[PREFLIGHT] Get current content list of the target storage"
-      ansible.builtin.shell: >
-        awk '/^dir: {{ proxmox_snippets_storage }}/,/^$/' /etc/pve/storage.cfg |
-        awk '/content/ {sub(/^content[[:space:]]*/, ""); print}'
-      register: current_content
-      changed_when: false
-
-    - name: "[PREFLIGHT] Ensure 'snippets' is in the content list"
-      ansible.builtin.replace:
+    - name: "[PREFLIGHT] Ensure 'snippets' is in the content list for dir storage"
+      ansible.builtin.lineinfile:
         path: /etc/pve/storage.cfg
-        regexp: "(?m)(^dir: {{ proxmox_snippets_storage }}[\\s\\S]*?content\\s*=\\s*)([^\\n]+)"
-        replace: "\\1{{ (current_content.stdout.split(',') | union(['snippets'])) | join(',') }}"
-      when: current_content.stdout != ""
+        regexp: "^(\\s*content\\s+)(.*)$"
+        line: '\1{{ (ansible_facts.storage_content.split(",") | union(["snippets"])) | join(",") }}'
+        backrefs: yes
+      vars:
+        ansible_facts:
+          storage_content: "{{ lookup('ansible.builtin.lines', '/etc/pve/storage.cfg') | select('match', '^\\s*dir: {{ proxmox_snippets_storage }}') | list | map('regex_search', '^\\s*content\\s+(.*)$') | select('string') | first | default('') }}"
         
     - name: "[PREFLIGHT] Ensure snippets storage exists"
       ansible.builtin.file: