RefreshTokenDestroyed 콜백 명칭 수정, LicenseCheckInterval 최솟값 버그 수정 및 불필요 using 정리

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

BaronSoftware.SSO/BaronSSO.cs

@@ -1,7 +1,5 @@
 using FluentScheduler;
-using System.ComponentModel;
 using System.Net.Http;
-using System.Net.NetworkInformation;
 
 namespace BaronSoftware.SSO
 {
@@ -181,7 +179,7 @@ namespace BaronSoftware.SSO
                 {
                     StopLicenseInterval();
                     await SignOutAsync();
-                    option.ExpiredToken?.Invoke();
+                    option.RefreshTokenDestroyed?.Invoke();
                 }
             }, run => run.Every(option.LicenseCheckInterval).Seconds()
             );