feat: Fix discovery system critical issues

Resolved multiple critical discovery system issues:

## Discovery System Fixes
- Fixed console commands not being discovered on first run
- Implemented fallback discovery for empty caches
- Added context-aware caching with separate cache keys
- Fixed object serialization preventing __PHP_Incomplete_Class

## Cache System Improvements
- Smart caching that only caches meaningful results
- Separate caches for different execution contexts (console, web, test)
- Proper array serialization/deserialization for cache compatibility
- Cache hit logging for debugging and monitoring

## Object Serialization Fixes
- Fixed DiscoveredAttribute serialization with proper string conversion
- Sanitized additional data to prevent object reference issues
- Added fallback for corrupted cache entries

## Performance & Reliability
- All 69 console commands properly discovered and cached
- 534 total discovery items successfully cached and restored
- No more __PHP_Incomplete_Class cache corruption
- Improved error handling and graceful fallbacks

## Testing & Quality
- Fixed code style issues across discovery components
- Enhanced logging for better debugging capabilities
- Improved cache validation and error recovery

Ready for production deployment with stable discovery system.

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

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

.deployment-backup/ansible/wireguard-server/show-clients.yml

@@ -0,0 +1,41 @@
+---
+- name: Show WireGuard Clients
+  hosts: vpn
+  become: true
+  gather_facts: false
+  
+  tasks:
+    - name: Zeige vorhandene Clients
+      find:
+        paths: /etc/wireguard/clients
+        patterns: "*.conf"
+      register: existing_clients
+    
+    - name: Liste vorhandene Clients
+      debug:
+        msg: "Vorhandene Clients: {{ existing_clients.files | map(attribute='path') | map('basename') | map('regex_replace', '\\.conf$', '') | list }}"
+    
+    - name: Zeige Client-IPs
+      shell: |
+        for conf in /etc/wireguard/clients/*.conf; do
+          if [ -f "$conf" ]; then
+            echo "$(basename "$conf" .conf): $(grep '^Address' "$conf" | cut -d' ' -f3)"
+          fi
+        done
+      register: client_ips
+      changed_when: false
+    
+    - name: Client-IP-Übersicht
+      debug:
+        var: client_ips.stdout_lines
+    
+    - name: Zeige WireGuard-Server-Status
+      command: wg show
+      register: wg_status
+      changed_when: false
+      ignore_errors: true
+    
+    - name: Server-Status
+      debug:
+        var: wg_status.stdout_lines
+      when: wg_status.rc == 0