feat: NICE CI accept 진행

BillHistory save 반영

src/main/java/cokr/xit/ens/modules/nice/service/NiceCiAcceptService.java

@@ -148,6 +148,7 @@ public class NiceCiAcceptService {
                             .billId(keySequenceService.getKeySequence("BillKko_id"))
                             .billerUserKey(data.getDataId())
                             .billerNoticeKey(billUid)
+                            // FIXME: 저장형태 확인 필요
                             .customUrl(gson.toJson(kkoPayUrlRespData.getCustomUrl()))
                             .expireAt(expireAt)                         //d.getExpiresDt()
                             .billUid(billUid)