Last updated date should be present for the downloadable files in dataset

[SmallhillCZ]

No description provided.

[jakubklimek]

This is currently not harvested by the catalog and it is by design. There is no reliable way of discovering this date. For manually entered dataset metadata, this is impossible. For data harvested from local data catalogs, this is implementation specific and only accurate for files stored directly in the catalog software, which is not a common case.