Merge branch 'stock' into dev

src/main/java/com/izouma/nineth/service/RockRecordService.java

@@ -37,7 +37,7 @@ public class RockRecordService {
                     .record(BigDecimal.ZERO)
                     .build();
         }
-        return rockRecordRepo.save(RockRecord.builder()
+        return rockRecordRepo.saveAndFlush(RockRecord.builder()
                 .lastRecord(BigDecimal.ZERO)
                 .operation("购买")
                 .amount(amount)