Changes touching this path

• loot-perf's runner stops open-coding the five opt-in halves three times over, because a half's measurement is now a field of the OPT_IN_HALVES row its batch name already came from and Fixtures::id is written from that same table, so deleting a row reddens a lib test that stayed green through exactly that deletion before (#1465) a5992206 · 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.