release: v0.1.2 — cornice dentils, changelog entry, TODO pruning

- Hero cornice finished: projecting corona over a 52-dentil course (0.18 x 0.30 x
  0.22 m at 0.45 m centres) so the top of the order has a shadow line instead of
  one flat box. Hero 3044 tris / 148 parts, still 14.50 m; rebuilt, re-imported,
  DemoMap rebuilt, packaged -qaselftest all PASS, screenshots re-rendered.
- CHANGELOG: full 0.1.2 entry (added: concept generator, FBX preset, facade probe,
  Ionic detail, tool tests; changed: 3.1 m storey height, 53.1% colonnade, smoothing
  groups; fixed: floating windows, flat medallions, missing facade collision, the
  three non-building heights).
- TODO: 0.1.2 section removed (goal stays in ROADMAP, whose status line is updated).
- MEMORY: release record incl. the recorded ornament assumptions.

Art/blender/hero/hero-facade-2026-11-07.json

@@ -73,6 +73,15 @@
       ],
       "evidence": "assumption: projecting cornice line"
     },
+    {
+      "object": "Hero_Dentil_xN",
+      "dims_m": [
+        0.18,
+        0.3,
+        0.22
+      ],
+      "evidence": "52 dentils at 0.45 m centres under the corona; assumption: photographed cornice reads as a dentilled course"
+    },
     {
       "object": "Hero_Entablature",
       "dims_m": [