Provide metadata updates in data export

We extract data from Gainsight using a filter on the lastActivityAt field, expected to be updated whenever there is activity on a topic, such as adding a reply, selecting the best answer, changing tags, merging topics. 

Currently, lastActivityAt only tracks genuine posting activity on a topic, the original post and new replies. It is not bumped by metadata changes like marking a best answer, adding or removing tags, or moving/merging a topic. Workaround offered to use Webhooks is not sufficient for our business case.
 

Suggested solutions:

1. The best solution is to have the lastActivityAt be triggered whenever a metadata changed, on the top of new content created.
2. The second best option is to have a new field with this metadata: lastModeratorActivityAt. 

This is critical for our community with 70+ technical moderators who closely monitor results, their KPIs and increase their efficiency.