Periodically update the status of files

Periodically (for example nightly, weekly) update the online status of files.

This could be combined with a column in the data sets page of the tape url for the set.

Start by tracing how file status and the data sets page represent tape URLs; the issue names no files, tests, or entry point. Define the periodic update cadence and how status should appear in the data sets page, then verify that file statuses refresh and the new column is accurate.

Written by the indexing model from the issue text.