Read template health, charges and flags through the bridge

Consumers of the legacy ItemTemplate combat_health_full,
item_initial_charges and item_flags now read getCombatHealthFull(),
getItemInitialCharges() and getItemFlags() on template.cacheTemplate.
No consumer read the template's combat_health_current; the
combat_health_current reads are the Item's own field.

Parity (offline, scripts/p14.py, 7586 templates): 0 differences in
combat_health_current, combat_health_full, item_initial_charges and
item_flags ("None" dropped on both sides). No value changes expected.

JSON-Refactor-Plan Task 1.4.

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

src/engine/net/client/handlers/RepairMsgHandler.java

@@ -85,7 +85,7 @@ public class RepairMsgHandler extends AbstractClientMsgHandler {
             //make sure item is damaged and not destroyed
 
             short dur = (short) toRepair.combat_health_current;
-            short max = (short) toRepair.template.combat_health_full;
+            short max = (short) toRepair.template.cacheTemplate.getCombatHealthFull();
 
             //account for durability modifications