feat: Implement Authentik group synchronization and add confirmation dialogs for service management

OTSSignsOrchestrator.Desktop/ViewModels/SettingsViewModel.cs

@@ -135,6 +135,7 @@ public partial class SettingsViewModel : ObservableObject
             // ── Load all other settings from Bitwarden ──
             using var scope = _services.CreateScope();
             var svc = scope.ServiceProvider.GetRequiredService<SettingsService>();
+            svc.InvalidateCache();
 
             // Git
             GitRepoUrl = await svc.GetAsync(SettingsService.GitRepoUrl, string.Empty);