@Override
    public int estimateSize() {
        return dn.length() + changes.size() * 32;
    }
@author James Chen
@implSpec <a href="https://datatracker.ietf.org/doc/html/rfc4511#section-4.6">4.6. Modify
          Operation</a>
turms-gateway/src/main/java/im/turms/gateway/infra/ldap/element/operation/modify/ModifyRequest.java