Changes touching this path

• a pull declares its ancestor closure instead of bare heads, so a server behind the client stops re-sending the whole history to say nothing new: the live forge no-op drops from 15.6s to 1.85s with no redeploy, and the wire gains an opt-in timing instrument (#1258) c1971c5e · 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.