Move the vendor mod table off the legacy item template

LOAD_TEMPLATE_MODTABLES now returns a templateID -> modTable map that
ForgeManager owns (vendorModTables). ForgeManager.forgeItem, WorkOrder
validation and the ManageNPCMsg forge item list read it through
ForgeManager.getVendorModTable(), and ItemTemplate.modTable is removed.

Values are unchanged: static_vendor_items has 5089 rows, one per
templateID, all present in static_item_templates, modTable 0-30.
Templates not in the table still read 0. The old loader stopped at the
first templateID missing from ItemTemplate.templates; there are none.
No comparator added or removed.

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

src/engine/db/handlers/dbItemHandler.java

@@ -201,23 +201,23 @@ public class dbItemHandler extends dbHandlerBase {
         }
     }
 
-    public void LOAD_TEMPLATE_MODTABLES() {
+    public HashMap<Integer, Integer> LOAD_TEMPLATE_MODTABLES() {
+
+        HashMap<Integer, Integer> modTables = new HashMap<>();
 
         try (Connection connection = DbManager.getConnection();
              PreparedStatement preparedStatement = connection.prepareStatement("SELECT * FROM `static_vendor_items`;");
              ResultSet rs = preparedStatement.executeQuery()) {
 
-            while (rs.next()) {
-                int templateID = rs.getInt("templateID");
-                int modTable = rs.getInt("modTable");
-                ItemTemplate template = ItemTemplate.templates.get(templateID);
-                template.modTable = modTable;
-            }
+            while (rs.next())
+                modTables.put(rs.getInt("templateID"), rs.getInt("modTable"));
 
         } catch (Exception e) {
             Logger.error(e);
         }
 
+        Logger.info("read: " + modTables.size());
+        return modTables;
     }
 
     public Item GET_ITEM(final int itemUUID) {