And move it to a different table so that we don't have to pay the
storage cost when not using it (most of the times).
Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>
The new oc_previews table is optimized for storing previews and should
decrease significantly the space taken by previews in the filecache
table.
This attend to reuse the IObjectStore abstraction over S3/Swift/Azure
but currently only support one single bucket configuration.
Signed-off-by: Carl Schwan <carl.schwan@nextclound.com>
