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/inventories/production/group_vars/all/main.yml

@@ -0,0 +1,26 @@
+---
+# Globale Variablen für das CDN
+
+# Domain-Konfiguration (ÄNDERE DIESE!)
+cdn_domain: "cdn.example.de"         # Deine CDN-Domain
+ssl_email: "admin@example.de"        # E-Mail für SSL-Zertifikate
+origin_domain: "www.example.de"      # Deine Haupt-Website
+
+# Cache-Einstellungen
+cache_settings:
+  static_files_ttl: "1y"    # CSS, JS, Fonts
+  images_ttl: "30d"         # Bilder
+  html_ttl: "5m"            # HTML-Seiten
+  api_ttl: "0"              # APIs (kein Caching)
+
+# DSGVO-Einstellungen
+gdpr_settings:
+  log_retention_days: 30
+  anonymize_ips: true
+  cookie_consent_required: true
+
+# Rate Limiting
+rate_limits:
+  api: "10r/s"
+  static: "100r/s"
+  images: "50r/s"

.deployment-backup/ansible/nginx-cdn-germany/inventories/production/group_vars/cdn_nodes/main.yml

@@ -0,0 +1,22 @@
+---
+# CDN-Node spezifische Konfiguration
+
+# Nginx Performance
+nginx_worker_processes: "auto"
+nginx_worker_connections: 2048
+nginx_keepalive_timeout: 65
+
+# Performance-Tuning
+tcp_optimizations:
+  tcp_nodelay: "on"
+  tcp_nopush: "on"
+  sendfile: "on"
+
+# Proxy-Einstellungen
+proxy_settings:
+  connect_timeout: "5s"
+  send_timeout: "10s"
+  read_timeout: "10s"
+  buffering: "on"
+  buffer_size: "64k"
+  buffers: "8 64k"

.deployment-backup/ansible/nginx-cdn-germany/inventories/production/hosts-grouped-keys.yml.example

@@ -0,0 +1,47 @@
+---
+# Inventar mit gruppierten SSH-Schlüsseln
+
+all:
+  children:
+    origin_servers:
+      hosts:
+        origin1.example.de:
+          ansible_host: 192.168.1.10
+        origin2.example.de:
+          ansible_host: 192.168.1.11
+      vars:
+        ansible_ssh_private_key_file: ~/.ssh/origin_servers_key
+        
+    cdn_nodes:
+      children:
+        primary_nodes:
+          hosts:
+            cdn-fra1.example.de:
+              ansible_host: 10.0.1.10
+              city: "Frankfurt"
+              region: "Hessen"
+              tier: "primary"
+              cache_size: "50g"
+          vars:
+            ansible_ssh_private_key_file: ~/.ssh/cdn_primary_key
+            
+        secondary_nodes:
+          hosts:
+            cdn-ham1.example.de:
+              ansible_host: 10.0.2.10
+              city: "Hamburg"
+              region: "Hamburg"
+              tier: "secondary"
+              cache_size: "20g"
+            cdn-muc1.example.de:
+              ansible_host: 10.0.3.10
+              city: "München"
+              region: "Bayern"
+              tier: "secondary"
+              cache_size: "20g"
+          vars:
+            ansible_ssh_private_key_file: ~/.ssh/cdn_secondary_key
+
+      vars:
+        ansible_user: root
+        ansible_ssh_common_args: '-o StrictHostKeyChecking=no'

.deployment-backup/ansible/nginx-cdn-germany/inventories/production/hosts-individual-keys.yml.example

@@ -0,0 +1,48 @@
+---
+# Inventar mit individuellen SSH-Schlüsseln
+
+all:
+  children:
+    origin_servers:
+      hosts:
+        origin1.example.de:
+          ansible_host: 192.168.1.10
+          datacenter: "Frankfurt"
+          ansible_ssh_private_key_file: ~/.ssh/origin1_key
+        origin2.example.de:
+          ansible_host: 192.168.1.11
+          datacenter: "Frankfurt"
+          ansible_ssh_private_key_file: ~/.ssh/origin2_key
+          
+    cdn_nodes:
+      hosts:
+        # Frankfurt - Primary
+        cdn-fra1.example.de:
+          ansible_host: 10.0.1.10
+          city: "Frankfurt"
+          region: "Hessen"
+          tier: "primary"
+          cache_size: "50g"
+          ansible_ssh_private_key_file: ~/.ssh/cdn_fra1_key
+          
+        # Hamburg - Secondary  
+        cdn-ham1.example.de:
+          ansible_host: 10.0.2.10
+          city: "Hamburg"
+          region: "Hamburg"
+          tier: "secondary"
+          cache_size: "20g"
+          ansible_ssh_private_key_file: ~/.ssh/cdn_ham1_key
+          
+        # München - Secondary
+        cdn-muc1.example.de:
+          ansible_host: 10.0.3.10
+          city: "München"
+          region: "Bayern"
+          tier: "secondary"
+          cache_size: "20g"
+          ansible_ssh_private_key_file: ~/.ssh/cdn_muc1_key
+
+      vars:
+        ansible_user: root
+        ansible_ssh_common_args: '-o StrictHostKeyChecking=no'

.deployment-backup/ansible/nginx-cdn-germany/inventories/production/hosts.yml

@@ -0,0 +1,45 @@
+---
+# Inventar für deutsches CDN
+
+all:
+  children:
+    origin_servers:
+      hosts:
+        origin1.example.de:
+          ansible_host: 192.168.1.10  # Ändere diese IP
+          datacenter: "Frankfurt"
+        origin2.example.de:
+          ansible_host: 192.168.1.11  # Ändere diese IP
+          datacenter: "Frankfurt"
+          
+    cdn_nodes:
+      hosts:
+        # Frankfurt - Primary
+        cdn-fra1.example.de:
+          ansible_host: 10.0.1.10     # Ändere diese IP
+          city: "Frankfurt"
+          region: "Hessen"
+          tier: "primary"
+          cache_size: "50g"
+          
+        # Hamburg - Secondary  
+        cdn-ham1.example.de:
+          ansible_host: 10.0.2.10     # Ändere diese IP
+          city: "Hamburg"
+          region: "Hamburg"
+          tier: "secondary"
+          cache_size: "20g"
+          
+        # München - Secondary
+        cdn-muc1.example.de:
+          ansible_host: 10.0.3.10     # Ändere diese IP
+          city: "München"
+          region: "Bayern"
+          tier: "secondary"
+          cache_size: "20g"
+
+      vars:
+        # SSH-Konfiguration
+        ansible_user: root
+        ansible_ssh_private_key_file: ~/.ssh/id_rsa
+        ansible_ssh_common_args: '-o StrictHostKeyChecking=no'