Fix remaining block-level failed_when syntax errors

Complete the fix for all block-level failed_when attributes in
hypervisor detection tasks. Ansible does not support failed_when
at the block level; it must be applied to individual tasks.

Changes:
- Fix Proxmox VE block (line 94-121)
  * Move failed_when: false to each task in the block
  * Remove invalid block-level failed_when

- Fix LXD/LXC block (line 135-162)
  * Move failed_when: false to each task in the block
  * Remove invalid block-level failed_when

- Fix Docker block (line 176-199)
  * Move failed_when: false to each task in the block
  * Remove invalid block-level failed_when

All hypervisor detection blocks now have proper error handling:
✅ libvirt - fixed in previous commit
✅ Proxmox VE - fixed in this commit
✅ LXD/LXC - fixed in this commit
✅ Docker - fixed in this commit

This resolves the recurring Ansible syntax error:
ERROR! 'failed_when' is not a valid attribute for a Block

The playbook should now execute without syntax errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

roles/system_info/tasks/detect_hypervisor.yml

@@ -97,24 +97,27 @@
       shell: pvecm status 2>/dev/null || echo "Not in a cluster"
       register: system_info_proxmox_cluster_raw
       changed_when: false
+      failed_when: false
 
     - name: List Proxmox VMs
       shell: qm list 2>/dev/null || echo "No VMs or qm not available"
       register: system_info_proxmox_vms_raw
       changed_when: false
+      failed_when: false
 
     - name: List Proxmox containers
       shell: pct list 2>/dev/null || echo "No containers or pct not available"
       register: system_info_proxmox_containers_raw
       changed_when: false
+      failed_when: false
 
     - name: Get Proxmox storage status
       shell: pvesm status 2>/dev/null || echo "Storage information not available"
       register: system_info_proxmox_storage_raw
       changed_when: false
+      failed_when: false
 
   when: "'pveversion' in system_info_proxmox_check_raw.stdout"
-  failed_when: false
   tags: [gather, hypervisor, proxmox]
 
 - name: Check for LXD/LXC
@@ -135,24 +138,27 @@
       shell: lxc list --format json
       register: system_info_lxd_containers_raw
       changed_when: false
+      failed_when: false
 
     - name: Get LXD storage pools
       shell: lxc storage list --format json
       register: system_info_lxd_storage_raw
       changed_when: false
+      failed_when: false
 
     - name: Get LXD networks
       shell: lxc network list --format json
       register: system_info_lxd_networks_raw
       changed_when: false
+      failed_when: false
 
     - name: Check LXD cluster status
       shell: lxc cluster list --format json 2>/dev/null || echo "[]"
       register: system_info_lxd_cluster_raw
       changed_when: false
+      failed_when: false
 
   when: "'Client version' in system_info_lxd_check_raw.stdout or 'Server version' in system_info_lxd_check_raw.stdout"
-  failed_when: false
   tags: [gather, hypervisor, lxd]
 
 - name: Check for Docker
@@ -173,21 +179,23 @@
       shell: docker ps -q | wc -l
       register: system_info_docker_running_raw
       changed_when: false
+      failed_when: false
 
     - name: Count total containers
       shell: docker ps -aq | wc -l
       register: system_info_docker_total_raw
       changed_when: false
+      failed_when: false
 
     - name: List Docker images
       shell: docker images --format "{{.Repository}}:{{.Tag}}" | wc -l
       register: system_info_docker_images_raw
       changed_when: false
+      failed_when: false
 
   when:
     - "'not installed' not in system_info_docker_check_raw.stdout"
     - "'not running' not in system_info_docker_check_raw.stdout"
-  failed_when: false
   tags: [gather, hypervisor, docker]
 
 - name: Check for Podman