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/nginx-cdn-germany/playbooks/manage-cdn.yml

@@ -0,0 +1,68 @@
+---
+# CDN Management Tasks
+- name: CDN Management and Maintenance
+  hosts: cdn_nodes
+  become: yes
+  vars_prompt:
+    - name: action
+      prompt: "What action? (purge-cache/reload-config/check-health/view-stats/warm-cache)"
+      private: no
+      
+  tasks:
+    - name: Purge all cache
+      shell: find /var/cache/nginx/ -type f -delete
+      when: action == "purge-cache"
+      
+    - name: Display cache purge result
+      debug:
+        msg: "✅ Cache purged on {{ inventory_hostname }}"
+      when: action == "purge-cache"
+      
+    - name: Reload nginx configuration
+      systemd:
+        name: nginx
+        state: reloaded
+      when: action == "reload-config"
+      
+    - name: Check CDN health
+      uri:
+        url: "https://{{ inventory_hostname }}/health"
+        method: GET
+        status_code: 200
+      register: health_result
+      when: action == "check-health"
+      
+    - name: Display health result
+      debug:
+        msg: "{{ health_result.content }}"
+      when: action == "check-health"
+      
+    - name: Show cache and system statistics
+      shell: |
+        echo "=== Cache Size ==="
+        du -sh /var/cache/nginx/
+        echo "=== Cache Files ==="
+        find /var/cache/nginx/ -type f | wc -l
+        echo "=== System Load ==="
+        uptime
+        echo "=== Memory Usage ==="
+        free -h
+        echo "=== Disk Usage ==="
+        df -h /
+      register: stats_result
+      when: action == "view-stats"
+      
+    - name: Display statistics
+      debug:
+        msg: "{{ stats_result.stdout_lines }}"
+      when: action == "view-stats"
+      
+    - name: Warm cache with popular URLs
+      uri:
+        url: "https://{{ inventory_hostname }}{{ item }}"
+        method: GET
+      loop:
+        - "/"
+        - "/health"
+      ignore_errors: yes
+      when: action == "warm-cache"