feat(D-01/B): add can_attach_padlock field to data-driven items (B0)

- DataDrivenItemDefinition: add canAttachPadlock boolean (default true)
- DataDrivenItemParser: parse "can_attach_padlock" from JSON
- DataDrivenBondageItem: add static canAttachPadlockTo(stack) method
- AnvilEventHandler: check V2 definition before allowing padlock attach

src/main/java/com/tiedup/remake/events/system/AnvilEventHandler.java

@@ -40,7 +40,11 @@ public class AnvilEventHandler {
 
         // Check if item can have a padlock attached (tape, slime, vine, web cannot)
         if (!lockable.canAttachPadlock()) {
-            return; // Item type cannot have padlock
+            return; // Item type cannot have padlock (V1)
+        }
+        // V2 data-driven items: check definition's can_attach_padlock field
+        if (!com.tiedup.remake.v2.bondage.datadriven.DataDrivenBondageItem.canAttachPadlockTo(left)) {
+            return;
         }
 
         // Item must not already have a padlock attached