Read item_type through the cache template bridge

Every consumer of the legacy ItemTemplate item_type now reads
template.cacheTemplate.getItemType(). Left on the legacy field: the
type count in dbItemHandler.LOAD_ITEM_TEMPLATES, which runs before the
bridge is linked. The charter checks already read DeedTemplate.

Parity (offline, static_item_templates vs the template
CObjectIndex.lookup picks, scripts/p14.py, 7586 templates: ITEM 4011,
DEED 880, RUNE 2695): 0 differences in item_type. No value changes
expected.

JSON-Refactor-Plan Task 1.4.

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

src/engine/objects/MobLoot.java

@@ -45,7 +45,7 @@ public final class MobLoot extends Item {
         this.ownerID = mob.getObjectUUID();
         this.objectUUID = generateId();
 
-        if (quantity == 0 && template.item_type == ItemType.RESOURCE)
+        if (quantity == 0 && template.cacheTemplate.getItemType() == ItemType.RESOURCE)
             quantity = 1;
 
         if (quantity > 0)
@@ -105,7 +105,7 @@ public final class MobLoot extends Item {
         if (isDeleted)
             return null;
 
-        if (this.template.item_type.equals(ItemType.GOLD))
+        if (this.template.cacheTemplate.getItemType().equals(ItemType.GOLD))
             return null;
 
         Item item = this;