Switch Item.template and MobLoot to CObjectTemplate

Item.template is now the cache template from CObjectTemplate.lookup
instead of the legacy DB ItemTemplate, so item.template.cacheTemplate.X
becomes item.template.X. MobLoot, LootManager, ItemManager.isTwoHanded/
isShield and CombatManager.getSwingAnimation take a CObjectTemplate.

No value changes: every getter already read the cache template through
the bridge, and the lookup resolves the same 7586 ids as
static_item_templates with the same item_type (offline parity p17.py,
0 differences).

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

src/engine/devcmd/cmds/SimulateBootyCmd.java

@@ -57,7 +57,7 @@ public class SimulateBootyCmd extends AbstractDevCmd {
             try {
                 mob.loadInventory();
                 for (Item lootItem : mob.charItemManager.getInventory()) {
-                    switch (lootItem.template.cacheTemplate.getItemType()) {
+                    switch (lootItem.template.getItemType()) {
                         case EMPLOYMENTCONTRACT: //CONTRACT
                             Contracts.add(lootItem);
                             break;