refs: survey the sibling project and recalibrate the hero facade

Tools/sibling_asset_audit.py reads the sibling security-game project's prop
library straight from the GLB headers: 20 street props, 11.8k triangles, every
one with a Blender source. The 50 .blend sources are copied to
Art/props/blender_src/ with a manifest; nothing is imported into Unreal yet. Its
building meshes are deliberately not taken - they are Godot GLBs built around a
29.6 m facade that this project measured at 25.75 m.

The facade proportions were wrong against the photograph: 5.7 m of blank wall
above the capitals. Entablature is now 3.4 m, parapet 2.2 m, with architrave and
cornice bands and square pedestals, so the elevation reads as layered stone.

Tools/hero_facade_build.py

@@ -43,11 +43,15 @@ COLUMN_BAY = 4.96
 FRONTAGE_Y = 0.0        # front plane sits at the building line of the block frame
 
 # --- assumptions -------------------------------------------------------------
+# Calibrated against the 2009 façade photograph: the entablature starts a little
+# over half the total height, and the parapet carries the motto at about three
+# quarters. The first pass had the enframed wall carrying 5.7 m of blank stone
+# above the capitals, which read as a warehouse rather than a temple.
 PEDESTAL_H = 1.45       # column pedestal top; entrance platform sits on it
 COLUMN_D = 0.95         # Ionic shaft diameter at the base
 CAPITAL_H = 0.95
-ENTABLATURE_H = 2.20
-PARAPET_H = 1.60
+ENTABLATURE_H = 3.40    # band between the capitals and the motto panel
+PARAPET_H = 2.20        # motto panel and cornice above the entablature
 PORTAL_W = 3.10         # each of the three door openings
 PORTAL_H = 3.40
 STEP_TREAD = 0.34
@@ -127,8 +131,8 @@ def build():
     for i in range(COLUMN_COUNT):
         x = -span / 2.0 + i * COLUMN_BAY
         col_xs.append(x)
-        cylinder(f"Hero_Pedestal_{i + 1}", x, -0.55, PEDESTAL_H, PEDESTAL_H + 0.55,
-                 0.62, stone, vertices=16)
+        cube(f"Hero_Pedestal_{i + 1}", x, -0.62, PEDESTAL_H + 0.27,
+             1.24, 1.24, 0.54, stone)
         cylinder(f"Hero_Column_{i + 1}", x, -0.55, PEDESTAL_H + 0.55,
                  PEDESTAL_H + 0.55 + (HEIGHT - ENTABLATURE_H - PARAPET_H - PEDESTAL_H - 0.55 - CAPITAL_H),
                  COLUMN_D / 2.0, stone)
@@ -140,6 +144,13 @@ def build():
 
     # --- entablature and parapet ------------------------------------------
     ent_z0 = HEIGHT - ENTABLATURE_H - PARAPET_H
+    # Lower entablature band (architrave) standing proud of the wall, so the
+    # elevation reads as layered stone rather than one flat plane.
+    cube("Hero_Architrave", 0.0, -1.55, ent_z0 + 0.42, FRONTAGE_W, 1.65, 0.84, stone)
+    note("Hero_Architrave", (FRONTAGE_W, 1.65, 0.84), "assumption: stacked entablature bands")
+    # Cornice under the parapet.
+    cube("Hero_Cornice", 0.0, -1.6, HEIGHT - PARAPET_H - 0.18, FRONTAGE_W, 1.75, 0.36, stone)
+    note("Hero_Cornice", (FRONTAGE_W, 1.75, 0.36), "assumption: projecting cornice line")
     cube("Hero_Entablature", 0.0, -0.75, ent_z0 + ENTABLATURE_H / 2.0,
          FRONTAGE_W, 1.5, ENTABLATURE_H, stone)
     note("Hero_Entablature", (FRONTAGE_W, 1.5, ENTABLATURE_H), "assumption: entablature depth")