Fix NPC rune sets storing the set id instead of the rune id

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

src/engine/db/handlers/dbNPCHandler.java

@@ -57,7 +57,7 @@ public class dbNPCHandler extends dbHandlerBase {
                     runeSets.put(runeSetID, runeList);
                 } else {
                     ArrayList<Integer> runeList = runeSets.get(runeSetID);
-                    runeList.add(runeSetID);
+                    runeList.add(runeBaseID);
                     runeSets.put(runeSetID, runeList);
                 }
             }