[FEATURE] Reflect that users might be in a group in a specific timeframe

[dtaivpp]

Is your feature request related to a problem?

At the moment there is no way to reflect that a user belonged in a group during one timeframe and another during time outside that timeframe.

Eg: Joe Schmo belonged to the OpenSearch org between Jan 2022 to Dec 2022. Commits made outside that range would belong to the non-org committers.

What solution would you like?

We should be able to specify a date range that someone belongs within a certain group. Eg.

# OpenSearch_org.txt
dtaivpp 2022-01-15 2022-12-01

What alternatives have you considered?

We could not add this in however we would risk overwriting history.

Do you have any additional context?

N/A