The nested promoted-missing-model test asset used readable slug ids for
its subgraph definitions. createNodeLocatorId only accepts UUID subgraph
ids, so getLiveWidget could not resolve the interior nodes, and the stale
promoted combobox never rendered disabled. Real subgraphs always get uuid
ids; the asset now matches, which is the actual fix for the interior
disabled-state assertion.
Revert the useProcessedWidgets disabled-derivation change: with valid
asset ids the original logic is correct, so the refactor was unnecessary.
d831b1de54
