Changes touching this path

• a disclosure invariant stops being written down with a reason its own test disproves twelve lines earlier, because what keeps a live delta from printing withheld content is two gates and neither is about the disk — `content_side_of` seals a recorded path outside `visible_paths_at`, and `classify` refuses rung 1 unless both sides hold bytes — which matters because `DagRepo::get` never checks grant expiry at all, so an expired grant is one decrypt away and only the seam refuses it (#1597) bc388741 · 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.