6ebe3d0d66
n->importance was stored, serialized, and clamped at creation but never read by any activation path — a curated importance=1.0 node competed identically with a default note. Multiply raw_wm by (0.5 + importance): default 0.5 nodes are unchanged (x1.0), critical x1.5, low x0.6; importance<=0 from legacy snapshots stays neutral. Verified activation and WM promotion unchanged for default-importance candidates.