this.bucket = bucket;

        final AwsBasicCredentials credentials = AwsBasicCredentials.create(accessKey, secretKey);
        final S3ClientBuilder builder =
                S3Client.builder().credentialsProvider(StaticCredentialsProvider.create(credentials)).region(Region.of(getRegion(region)));

        // For non-AWS endpoints (MinIO, etc.), set custom endpoint with path-style access
        if (StringUtil.isNotBlank(endpoint)) {