Implement alert correlation UI

- Add hooks and components for correlated alerts and incidents
- Integrate panels into MonitoringOverview
- Extend query keys for correlation and incidents
- Implement incident actions (create, acknowledge, resolve) and wiring

src/lib/queryKeys.ts

@@ -92,5 +92,8 @@ export const queryKeys = {
     groupedAlerts: (options?: { includeResolved?: boolean; minCount?: number; severity?: string }) => 
       ['monitoring', 'grouped-alerts', options] as const,
     alertGroupDetails: (groupKey: string) => ['monitoring', 'alert-group-details', groupKey] as const,
+    correlatedAlerts: () => ['monitoring', 'correlated-alerts'] as const,
+    incidents: (status?: string) => ['monitoring', 'incidents', status] as const,
+    incidentDetails: (incidentId: string) => ['monitoring', 'incident-details', incidentId] as const,
   },
 } as const;