fix(event): 이벤트 목록 중복 로드를 막는다

SodaLive/Sources/Settings/Event/EventListView.swift

@@ -11,6 +11,7 @@ import Kingfisher
 struct EventListView: View {
     
     @ObservedObject var viewModel = EventListViewModel()
+    @State private var hasLoadedEvents = false
     
     var body: some View {
         BaseView(isLoading: $viewModel.isLoading) {
@@ -50,6 +51,8 @@ struct EventListView: View {
         }
         .sodaToast(isPresented: $viewModel.isShowPopup, message: viewModel.errorMessage, autohideIn: 2)
         .onAppear {
+            guard !hasLoadedEvents else { return }
+            hasLoadedEvents = true
             viewModel.getEvents()
         }
     }