Changes touching this path

• the relay store goes behind a RelayStorage seam, the SigV4 driver moves to its own crate, and an object-store relay is a second deployable the CLI never ships (#38) 330df915 · dbf3dbe6…

Renames are not followed. loot's tree maps a path to an address, so a rename is a delete and an add. This list is the history of the name, not of the bytes.