Sentinel-1 obsolete images are not removed automagically

The S-1 images are occasionally reprocessed, and new editions are loaded. Those images present new hexadecimal suffixes and the same meta information (but for processing time). Currently, no obsolete images have been deleted from the archive (and database). It would be nice to create a workflow to detect deleted images, notify regularly about their presence, and optionally remove them. It would also be appropriate to list only the most recent ones. Reprocessing can also happen for other satellites, but names are not updated. It makes sense to have some sort of notification for new images (and possibly the possibility of downloading them on demand).

This could probably be combined with the searching of deleted products.