fix: 토큰 db 없을때 로그아웃 처리

Author: sapiens2000

src/main/java/com/example/log4u/common/oauth2/jwt/JwtLogoutFilter.java

@@ -114,6 +114,15 @@ private boolean validateTokenExpiration(
 		Boolean isExist = refreshTokenService.existsByRefresh(refresh);
 		if (Boolean.FALSE.equals(isExist)) {
 			log.warn("DB에 존재하지 않는 토큰");
+
+			// 쿠키 제거
+			CookieUtil.deleteCookie(response, ACCESS_TOKEN);
+			CookieUtil.deleteCookie(response, REFRESH_TOKEN);
+
+			// 응답 (404 방지)
+			response.setStatus(HttpServletResponse.SC_OK);
+			response.setContentType("application/json");
+
 			response.setStatus(HttpServletResponse.SC_OK);
 			return false;
 		}