Restack the ask-user domain layer onto the carrier-chain architecture
branch. Conflict policy: runtime and ui-conversation take the
carrier-chain side (master sessions shape, dual-kind PendingCard,
'internal' envelope shell tests); the 'cancelled' wire code and its
semantics tests stay in apiproxy + ui-question (domain layer); the
smoke fixture keeps the nine-bundle success pass with the resident
question round over the carrier-chain first-describe shape.
imccyu
2b06aa0102