Implement Phase 1 audit logging

Add centralized admin action logger and integrate logging for:
- Alert resolutions (system, rate limit, grouped)
- Role grants/revokes in UserRoleManager
- Incident creation/acknowledgement/resolution
- Moderation lock overrides

Includes file updates and usage across relevant components to ensure consistent audit trails.

src/hooks/admin/useAlertGroupActions.ts

@@ -44,6 +44,14 @@ export function useResolveAlertGroup() {
         }
       }
       
+      // Log to audit trail
+      const { logAdminAction } = await import('@/lib/adminActionAuditHelpers');
+      await logAdminAction('alert_group_resolved', {
+        alert_source: source,
+        alert_count: alertIds.length,
+        alert_ids: alertIds,
+      });
+      
       return { count: alertIds.length, updatedAlerts: data };
     },
     onMutate: async ({ alertIds }) => {