Is your feature request related to a problem? Please describe.
When exporting / Uploading dashboards could it be possible to add a note ?
After an upload version info from source Grafana Dashbaord is not kept and it could be interesting to have a way to add a note when exporting to Grafana.
I didn't check if Grafana API permit this.

Describe the solution you'd like
Add an way to add a note during dashboard export / upload to Grafana. It could permit to follow historical versions of a dashbaord when stored outside Grafana and uploaded in different Grafana instances.

Describe alternatives you've considered
None yet.

Additional context
Big picture would be to manage dashboard versioning outside Grafana.