Changes touching this path

• a push's follow-up batches stop re-walking every change and every manifest to locate their 32 addresses, because the membership and key answers that walk produced are now taken once per transfer, which makes bundle_wanted_batched's own O(total_objects x num_batches) disclaimer true for the first time, measured at -44.1% by a new bundle_batched timing that is the only number in the harness reaching a follow-up bundle 5d7fdccf · 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.