Brummel
73e1558383
Auto-signed under /boss spec auto-sign: all objective gates green (Step-1.5 precondition, Step-4 self-review, Step-5 grounding-check PASS) and a unanimous five-lens spec-skeptic panel SOUND, after one editorial round on the ambiguity lens (the test-migration rule was sharpened to a three-role classification: eval-output -> Cell, column-write -> Scalar, channel-send -> Scalar). Spec for the deferred C7/C8 carrier swap flagged by the C7 realization note: Cell becomes the hot-path value carrier (Node::eval -> Option<&[Cell]>, node out-buffers, inter-node forward via a new AnyColumn::push_cell), and Scalar narrows to the self-describing dynamic boundaries (the param path, AnyColumn::get, source ingestion). Behaviour-preserving (C1): only the carrier type narrows. refs #74