Run 12: knowledge system, mortality, and the North's generational soul

SPEC §5 built: three skill domains (forage/woodcraft/masonry) that pay
off and grow by practice; proximity diffusion soul-calibrated by
absorption x teaching-drive; and mortality - the piece that makes
knowledge generational. Elders die (~150-230 days), everything unshared
dies with them, a youth comes of age near knowing nothing. North soul
(absorption 1.6, teaching 0.9) vs South (1.0, 0.3); East teaches no one.

Two findings: (1) headless soaks were contaminated by orphaned child
processes writing later runs' CSVs - fixed with StopAfterDays clean
self-terminate; (2) passive diffusion barely helped - the North's real
culture is the young seeking elders on purpose, so added deliberate
teacher-seeking and youths now cradle beside the wisest elder. North
now leads knowledge at every checkpoint, but a stable town approaches
the ceiling regardless, so teaching is a recovery advantage not an
equilibrium one. The crisis-recovery experiment is the real test, noted
in FINDINGS as next.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/Visualization.cs

@@ -135,9 +135,10 @@ public partial class Visualization : Node2D
             DrawString(font, new Vector2(PanelX + 36, y),
                 $"{i + 1,2}  {npc.State,-11}  {npc.Activity}",
                 fontSize: 13, modulate: TextMain);
-            DrawString(font, new Vector2(PanelX + 400, y),
-                $"F {npc.Fatigue,3:0}  N {npc.Nourishment * 100,3:0}  D {npc.Imprint.Total * 100,2:0}" +
-                $"  C {npc.TotalCarried(),4:0.0}  {npc.DominantStateToday().ToString().ToLower()[..4]}",
+            DrawString(font, new Vector2(PanelX + 390, y),
+                $"N {npc.Nourishment * 100,3:0}  D {npc.Imprint.Total * 100,2:0}" +
+                $"  K {npc.Know.Total,4:0.00}  A {npc.AgeDays,3:0}" +
+                $"  {npc.DominantStateToday().ToString().ToLower()[..4]}",
                 fontSize: 12, modulate: TextDim);
         }