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/scripts/ssh-keys.sh

@@ -0,0 +1,125 @@
+#!/bin/bash
+# SSH-Schlüssel Management für CDN
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+show_help() {
+    echo "CDN SSH Key Management"
+    echo ""
+    echo "Usage: $0 [OPTION]"
+    echo ""
+    echo "Options:"
+    echo "  single     - Ein Schlüssel für alle Nodes (Standard)"
+    echo "  individual - Separater Schlüssel pro Node"
+    echo "  grouped    - Gruppierte Schlüssel (Primary/Secondary)"
+    echo "  generate   - SSH-Schlüssel generieren"
+    echo "  deploy     - Öffentliche Schlüssel zu Servern kopieren"
+    echo "  help       - Diese Hilfe anzeigen"
+}
+
+generate_single_key() {
+    echo "🔑 Generiere einen SSH-Schlüssel für alle CDN-Nodes..."
+    
+    if [ ! -f ~/.ssh/cdn_key ]; then
+        ssh-keygen -t ed25519 -C "cdn-deployment" -f ~/.ssh/cdn_key -N ""
+        echo "✅ Schlüssel generiert: ~/.ssh/cdn_key"
+    else
+        echo "ℹ️  Schlüssel existiert bereits: ~/.ssh/cdn_key"
+    fi
+    
+    # Inventar anpassen
+    sed -i 's|ansible_ssh_private_key_file: .*|ansible_ssh_private_key_file: ~/.ssh/cdn_key|' \
+        "$SCRIPT_DIR/../inventories/production/hosts.yml"
+    
+    echo "✅ Inventar aktualisiert"
+}
+
+generate_individual_keys() {
+    echo "🔑 Generiere individuelle SSH-Schlüssel..."
+    
+    NODES=("cdn_fra1" "cdn_ham1" "cdn_muc1" "origin1" "origin2")
+    
+    for node in "${NODES[@]}"; do
+        if [ ! -f ~/.ssh/${node}_key ]; then
+            ssh-keygen -t ed25519 -C "cdn-${node}" -f ~/.ssh/${node}_key -N ""
+            echo "✅ Schlüssel generiert: ~/.ssh/${node}_key"
+        else
+            echo "ℹ️  Schlüssel existiert bereits: ~/.ssh/${node}_key"
+        fi
+    done
+    
+    echo "✅ Alle individuellen Schlüssel generiert"
+    echo "💡 Verwende: cp inventories/production/hosts-individual-keys.yml.example inventories/production/hosts.yml"
+}
+
+generate_grouped_keys() {
+    echo "🔑 Generiere gruppierte SSH-Schlüssel..."
+    
+    GROUPS=("origin_servers" "cdn_primary" "cdn_secondary")
+    
+    for group in "${GROUPS[@]}"; do
+        if [ ! -f ~/.ssh/${group}_key ]; then
+            ssh-keygen -t ed25519 -C "cdn-${group}" -f ~/.ssh/${group}_key -N ""
+            echo "✅ Schlüssel generiert: ~/.ssh/${group}_key"
+        else
+            echo "ℹ️  Schlüssel existiert bereits: ~/.ssh/${group}_key"
+        fi
+    done
+    
+    echo "✅ Alle gruppierten Schlüssel generiert"
+    echo "💡 Verwende: cp inventories/production/hosts-grouped-keys.yml.example inventories/production/hosts.yml"
+}
+
+deploy_keys() {
+    echo "🚀 Deploye öffentliche Schlüssel zu den Servern..."
+    
+    # Lese IPs aus dem Inventar
+    IPS=$(grep "ansible_host:" "$SCRIPT_DIR/../inventories/production/hosts.yml" | awk '{print $2}' | sort | uniq)
+    
+    for ip in $IPS; do
+        echo "Deploying to $ip..."
+        
+        # Versuche verschiedene Schlüssel
+        for key in ~/.ssh/*_key ~/.ssh/cdn_key ~/.ssh/id_rsa; do
+            if [ -f "$key" ]; then
+                echo "  Versuche Schlüssel: $key"
+                if ssh-copy-id -i "${key}.pub" "root@$ip" 2>/dev/null; then
+                    echo "  ✅ Erfolgreich: $key -> $ip"
+                    break
+                fi
+            fi
+        done
+    done
+}
+
+case "$1" in
+    "single")
+        generate_single_key
+        ;;
+    "individual")
+        generate_individual_keys
+        ;;
+    "grouped")
+        generate_grouped_keys
+        ;;
+    "generate")
+        echo "Welche Art von Schlüsseln?"
+        echo "1) Ein Schlüssel für alle (empfohlen für Start)"
+        echo "2) Individuelle Schlüssel pro Node (sicherste)"
+        echo "3) Gruppierte Schlüssel (Kompromiss)"
+        read -p "Wähle (1-3): " choice
+        
+        case $choice in
+            1) generate_single_key ;;
+            2) generate_individual_keys ;;
+            3) generate_grouped_keys ;;
+            *) echo "Ungültige Auswahl" ;;
+        esac
+        ;;
+    "deploy")
+        deploy_keys
+        ;;
+    "help"|*)
+        show_help
+        ;;
+esac