Serialize static buildings' asset block as live servers did

Live LOADSTRUCTURE records send static props and their furniture with
objectid_d and objectid_e zero and unknown_bool_b false; furniture also
has 0/0 health (4,506 of 4,506 live child props). The server sent its own
ID, the owner, the flag set and health for every building. Static
buildings now write the live values; player buildings keep the old block.

Still different from live, not touched here: top-level static health (live
0 for most props), the int_c icon on some props, and the object type word.

Value changes (wire only): static buildings send no own ID, owner or flag;
static furniture sends 0/0 health.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/objects/Building.java

@@ -350,19 +350,38 @@ public class Building extends AbstractWorldObject {
 
         writer.put((byte) 0);  // 0
         writer.putFloat(3);  // 3
-        writer.putInt(GameObjectType.Building.ordinal());
-        writer.putInt(building.getObjectUUID());
 
-        if (building.ownerIsNPC)
-            writer.putInt(GameObjectType.NPC.ordinal());
-        else
-            writer.putInt(GameObjectType.PlayerCharacter.ordinal());
+        // Live static props and their furniture: no own ID, no owner, flag clear, and no health on furniture.
+        if (building.isStaticWorldObject()) {
 
-        writer.putInt(building.ownerUUID);
+            for (int i = 0; i < 4; i++)
+                writer.putInt(0);
 
-        writer.put((byte) 1); // End Datablock
-        writer.putFloat(building.health.get());
-        writer.putFloat(building.healthMax);
+            writer.put((byte) 0);
+
+            if (building.parentBuildingID != 0) {
+                writer.putFloat(0);
+                writer.putFloat(0);
+            } else {
+                writer.putFloat(building.health.get());
+                writer.putFloat(building.healthMax);
+            }
+
+        } else {
+            writer.putInt(GameObjectType.Building.ordinal());
+            writer.putInt(building.getObjectUUID());
+
+            if (building.ownerIsNPC)
+                writer.putInt(GameObjectType.NPC.ordinal());
+            else
+                writer.putInt(GameObjectType.PlayerCharacter.ordinal());
+
+            writer.putInt(building.ownerUUID);
+
+            writer.put((byte) 1); // End Datablock
+            writer.putFloat(building.health.get());
+            writer.putFloat(building.healthMax);
+        }
 
         if (building.blueprintUUID == 0)
             writer.putInt(0);