Fix critical playbook execution errors in system_info role

Fix three critical errors preventing playbook execution:
1. Ansible syntax error in hypervisor detection
2. Missing OS-specific variable files
3. Invalid inventory plugin configuration

Changes to roles/system_info/tasks/detect_hypervisor.yml:
- Fix invalid failed_when at block level (line 75)
- Move failed_when: false to individual tasks within the block
- Ansible blocks don't support failed_when attribute directly
- Each libvirt detection task now has failed_when: false

Changes to roles/system_info/vars/:
- Create Debian.yml with Debian/Ubuntu specific variables
- Create RedHat.yml with RHEL/CentOS/Rocky/Alma variables
- Create Suse.yml with SUSE/openSUSE variables
- Define OS-specific package names and paths
- Fixes "Could not find or access 'Debian.yml'" error

Changes to inventories/development/libvirt_kvm.yml:
- Fix plugin name: libvirt_kvm → community.libvirt.libvirt
- Update URI to use local system: qemu:///system
- Fix compose variables: use ansible_libvirt_* prefix
- Fix groups conditions to use ansible_libvirt_state
- Fix keyed_groups to use ansible_libvirt_* variables
- Remove unsupported hypervisors array configuration
- Add strict: false for graceful error handling

Error details fixed:
ERROR 1: 'failed_when' is not a valid attribute for a Block
  Location: detect_hypervisor.yml:42
  Solution: Moved to individual tasks

ERROR 2: Could not find or access 'Debian.yml'
  Location: roles/system_info/vars/
  Solution: Created OS-specific variable files

ERROR 3: inventory config specifies unknown plugin 'libvirt_kvm'
  Location: inventories/development/libvirt_kvm.yml
  Solution: Corrected to community.libvirt.libvirt

Testing: These fixes resolve the playbook syntax errors and allow
the gather_system_info playbook to run successfully on available hosts.

Related to: ROLE_ANALYSIS_AND_IMPROVEMENTS.md recommendations

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

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

roles/system_info/tasks/detect_hypervisor.yml

@@ -45,34 +45,38 @@
       shell: virsh version
       register: system_info_libvirt_version_raw
       changed_when: false
+      failed_when: false
       become: true
 
     - name: List libvirt networks
       shell: virsh net-list --all
       register: system_info_libvirt_networks_raw
       changed_when: false
+      failed_when: false
       become: true
 
     - name: List libvirt storage pools
       shell: virsh pool-list --all
       register: system_info_libvirt_pools_raw
       changed_when: false
+      failed_when: false
       become: true
 
     - name: Count running VMs
       shell: virsh list --state-running | grep -c running || echo "0"
       register: system_info_libvirt_running_vms_raw
       changed_when: false
+      failed_when: false
       become: true
 
     - name: Count total VMs
       shell: virsh list --all | tail -n +3 | grep -v "^$" | wc -l
       register: system_info_libvirt_total_vms_raw
       changed_when: false
+      failed_when: false
       become: true
 
   when: "'available' in system_info_virsh_check_raw.stdout"
-  failed_when: false
   tags: [gather, hypervisor, libvirt]
 
 - name: Check for Proxmox VE