ISO-8601 Date Format String is Changed After Data Migration

[dicksonlee-harmonicinc]

We are trying to migrate data from cosmosdb container A to B using the tool, one of the fields of the record is a ISO-8601 string as follows:

{
  "event_time": "2023-12-19T00:00:00.000Z"
}

However, after migrating to container B, the record is saved as follows:

{
  "event_time": "2023-12-19T00:00:00Z"
}

the content of event_time is changed, which is not expected. We found a similar issue reported before: #36

[khlamat]

Same here, I performed data migration using Release 2.1.4 and found that the data lost the millisecond precision.
Is it possible to have an option to keep the date format?