v1.42.1 : Hotfix: model calls overflowed the stack

Hotfix — install this instead of v1.42.0. In v1.42.0 every model call failed with "Maximum call stack size exceeded": the client's settings accessor called itself after a blanket rename during the independent-judge work. Fixed, with a regression test. Nothing else changed — see the v1.42.0 notes for what this release contains.