Columna 0.12.1 — category-driver descriptions (data-only)
Data-only patch: the two category-profile driver measures gain their describe descriptions.
priority and alloc_weight shipped 0.7.0 with empty descriptions — their folklore was written on the line after the MEASURE, which the parser (a DESCRIPTION lives on the header, before the FAMILY block) does not read. Moved inline and ratified:
priority— the category's assignment rank — 1 ranks first; drives the primary facealloc_weight— the category's relative allocation weight — normalized per product at the crossing; drives the split face
So describe_manifold, the Explorer, and the spec all carry them. No parser change (the placement was the defect); no wire-schema, no contract change.
Versions: columna-server 0.7.1, columna (metapackage) 0.12.1; columna-core unchanged (0.12.0). Requires columna-core>=0.12.0.