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/infrastructure/roles/monitoring/handlers/main.yml

@@ -0,0 +1,45 @@
+---
+# Monitoring Role Handlers
+
+- name: reload systemd
+  systemd:
+    daemon_reload: true
+  listen: reload systemd
+
+- name: restart monitoring
+  systemd:
+    name: "{{ item }}"
+    state: restarted
+  loop:
+    - health-check.service
+  listen: restart monitoring
+  ignore_errors: true
+
+- name: restart node-exporter
+  systemd:
+    name: node_exporter
+    state: restarted
+  listen: restart node-exporter
+  when: node_exporter_enabled | bool
+
+- name: start monitoring services
+  systemd:
+    name: "{{ item }}"
+    state: started
+    enabled: true
+  loop:
+    - health-check.timer
+  listen: start monitoring services
+  ignore_errors: true
+
+- name: reload monitoring config
+  command: "{{ monitoring_scripts_dir }}/monitoring-utils.sh reload"
+  listen: reload monitoring config
+  become_user: "{{ monitoring_user }}"
+  ignore_errors: true
+
+- name: test alerts
+  command: "{{ monitoring_scripts_dir }}/send-alert.sh TEST 'Test Alert' 'This is a test alert from Ansible deployment'"
+  listen: test alerts
+  become_user: "{{ monitoring_user }}"
+  ignore_errors: true