Update template with cli logging
CSV import: add digital object columns, refs #6525

This adds two new columns: digital object URI, and digital object path.
These two fields are mutually exclusive, and URI will be preferred over
path if both are provided.

To maintain a 1:1 mapping between input rows and information objects,
only a single digital object can be imported per item using this method.
Fix link to external assets in showDownloadComponent, fixes #6548

This moves the construction of a public URL into an instance method on
QubitDigitalObject, so consumers like showDownloadComponent don't
need to actually care whether the target is local.