Background refresh

Implement background refresh?

Easy to do - but should we? If so - can we make it happen more often on conference dates (when data is changing due to video links) and far less often before and after (when data is static) ?

We register that we want to use it - then at app start we call setMinimumBackgroundFetchInterval. I wonder if we can simply not call that unless opened on a conference day ? How to turn off afterwards?

No file or test is named. Start by locating the app-start call to setMinimumBackgroundFetchInterval and trace how conference dates and background refresh are registered; done means agreeing on and implementing refresh behavior for conference days versus static periods, including how it is disabled afterward.

Written by the indexing model from the issue text.