docs: add monitoring alerting updates

docs/AI_CONTEXT.md

@@ -33,6 +33,7 @@ Public IP: 51.255.83.140
 * Grafana
 * Node Exporter
 * cAdvisor
+* Alertmanager
 
 ## Domains
 
@@ -115,6 +116,7 @@ Components:
 * Grafana
 * Node Exporter
 * cAdvisor
+* Alertmanager
 
 Validated:
 
@@ -124,12 +126,22 @@ Validated:
 * cAdvisor
 * Backup metrics
 * Grafana datasource
+* Alertmanager email routing
 
 Grafana has custom backup, system and Docker monitoring dashboards.
 
+Alertmanager implements incident intelligence with incident groups:
+
+* `backup_failure`
+* `system_pressure`
+* `storage_pressure`
+* `database_outage`
+* `monitoring_failure`
+* `container_health`
+
 ## Backup
 
-Backup v2 is operational.
+Backup v5.3 is production.
 
 Implemented:
 
@@ -140,6 +152,10 @@ Implemented:
 * Automatic cleanup
 * Prometheus metrics export
 * Restore validation
+* Lock file protection
+* Disk space validation
+* Central logging
+* Structured failure handling
 
 Verified:
 
@@ -160,9 +176,9 @@ and the README.md of each service folder before making infrastructure recommenda
 
 Roadmap:
 
-* Phase 1 completed: Grafana, Prometheus, Node Exporter, cAdvisor, backup metrics integration
+* Phase 1 completed: Grafana, Prometheus, Node Exporter, cAdvisor, Alertmanager, backup metrics integration, incident intelligence
 * Phase 1 remaining: Loki, Redis, Authelia
-* Phase 2 completed: Backup v2 automation, restore validation
+* Phase 2 completed: Backup v5.3 automation, restore validation
 * Phase 2 remaining: CrowdSec, Sentry, Fail2Ban upgrade, Cloudflare rate limiting and WAF
 * Phase 3: SonarQube, Harbor, Backstage, Nextcloud