Some implementations of DirectoryService might not allow retrieval of
intermediate Directory nodes, that are not at the "root".
Think about an object store implementation. The client is doing a
get_recursive anyways to reduce the number of roundtrips.
By documenting the fact we don't need to support looking up intermediate
Directory messages, we can just batch all directories into the same
object, keyed by the root.
Change-Id: I019d720186d03c4125cec9191e93d20586a20963
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10988
Autosubmit: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
b38badf206