Hi John,
as pointed out by Jan already, we conceived grafana-wtf in order to assist in such Grafana archeology types of tasks.
On this matter, you might like the new grafana-wtf explore {dashboards,datasources} subcommands we added together with @chenlujjj and @jangaraj at How to find out unused datasources? just recently.
Please let us know if that fits your bill already or whether you see any further improvements you might need for your specific use case.
With kind regards,
Andreas.