[refactor] 토큰 만료 시간 변경

src/main/java/org/sopt/sweet/domain/member/service/OAuthService.java

@@ -134,7 +134,7 @@ public MemberTokenResponseDto saveToken(Long memberId) {
             refreshToken = storedRefreshToken;
         } else {
             refreshToken = issueNewRefreshToken(memberId);
-            redisTemplate.opsForValue().set(redisKey, refreshToken, 1, TimeUnit.HOURS);
+            redisTemplate.opsForValue().set(redisKey, refreshToken, 7, TimeUnit.DAYS);
         }
 
         System.out.println("카카오 로그인 성공 memberId: " + memberId + " accessToken :" + accessToken + " refreshToken: " + refreshToken);