Consider designs for feedback loops to maintain drain data

[jasonlally]

Opening this issue to capture/discuss alternatives for creating feedback loops to help maintain drain data.

From @alocalsewerhistorian via #198

I'd recommend having some flag to show any drains adopted that have been deleted or even leave adopted drains which might be deleted by the update operation. We'd be happy to take a feedback loop (if possible). One idea would be to have a "data steward" contact field in the app and a "data quality" feedback, both for users who find items which are missing or not located properly and for this kind of update. Maybe some email auto-notification loop on update including listing any adopted drains which are deleted by update.