Fix Jinja2 template conflicts in Docker and Podman detection

Escape Go template syntax in shell commands to prevent Ansible from
interpreting them as Jinja2 templates.

Errors fixed:
  template error while templating string: unexpected '.'
  String: docker version --format '{{.Server.Version}}'
  String: docker images --format "{{.Repository}}:{{.Tag}}"
  String: podman version --format '{{.Version}}'

Changes:
- Docker version check: Escape {{.Server.Version}}
- Docker images list: Escape {{.Repository}} and {{.Tag}}
- Podman version check: Escape {{.Version}}

Solution:
  Convert {{ to {{ "{{" }} and }} to {{ "}}" }}
  This tells Ansible to output literal {{ }} in the shell command
  The Docker/Podman CLI then interprets the Go templates correctly

Example:
  Before: '{{.Server.Version}}'
  After:  '{{ "{{" }}.Server.Version{{ "}}" }}'
  Result: Shell receives '{{.Server.Version}}' as intended

Testing: Playbook now completes successfully without template errors.

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

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

roles/system_info/tasks/detect_hypervisor.yml

@@ -164,7 +164,7 @@
 - name: Check for Docker
   shell: |
     if command -v docker &> /dev/null; then
-      docker version --format '{{.Server.Version}}' 2>/dev/null || echo "Docker installed but not running"
+      docker version --format '{{ "{{" }}.Server.Version{{ "}}" }}' 2>/dev/null || echo "Docker installed but not running"
     else
       echo "Docker not installed"
     fi
@@ -188,7 +188,7 @@
       failed_when: false
 
     - name: List Docker images
-      shell: docker images --format "{{.Repository}}:{{.Tag}}" | wc -l
+      shell: docker images --format "{{ "{{" }}.Repository{{ "}}" }}:{{ "{{" }}.Tag{{ "}}" }}" | wc -l
       register: system_info_docker_images_raw
       changed_when: false
       failed_when: false
@@ -201,7 +201,7 @@
 - name: Check for Podman
   shell: |
     if command -v podman &> /dev/null; then
-      podman version --format '{{.Version}}'
+      podman version --format '{{ "{{" }}.Version{{ "}}" }}'
     else
       echo "Podman not installed"
     fi