Read item weight, value and base name through the bridge

Consumers of the legacy ItemTemplate item_wt, item_value and
item_base_name now read getItemWt(), getItemValue() and
getItemBaseName() on template.cacheTemplate.

Parity (offline, scripts/p14.py, 7586 templates): 0 differences in
item_wt, item_value and item_base_name. No value changes expected.

JSON-Refactor-Plan Task 1.4.

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

src/engine/gameManager/BuildingManager.java

@@ -201,7 +201,7 @@ public enum BuildingManager {
 
                 ItemTemplate template = ItemTemplate.templates.get(1705032); // Elan Stone
 
-                if (!player.charItemManager.hasRoomInventory(template.item_wt))
+                if (!player.charItemManager.hasRoomInventory(template.cacheTemplate.getItemWt()))
                     return false;
 
                 if (!ItemManager.MakeItemForPlayer(template.template_id, player, amount))
@@ -223,7 +223,7 @@ public enum BuildingManager {
                     if (resourceTemplate == null)
                         continue;
 
-                    if (!player.charItemManager.hasRoomInventory(resourceTemplate.item_wt)) {
+                    if (!player.charItemManager.hasRoomInventory(resourceTemplate.cacheTemplate.getItemWt())) {
                         ChatManager.chatSystemInfo(player, "You can not carry any more of that item.");
                         return false;
                     }