[BUGFIX] 새벽 시간대 검색 방지 로직 복구

Author: woolnd

Atcha-iOS/Presentation/Course/CourseSearch/CourseSearchViewModel.swift

@@ -130,12 +130,12 @@ final class CourseSearchViewModel: BaseViewModel {
     // MARK: - 코스 검색 스트리밍용
     func startCourseStream() {
 
-//        if isBlackoutNow() {
-//            setLoading(false)
-//            isServerError = true
-//            courses = []
-//            return
-//        }
+        if isBlackoutNow() {
+            setLoading(false)
+            isServerError = true
+            courses = []
+            return
+        }
 
         courseStreamTask?.cancel()
         setLoading(true)