fix: syncScores每次确保objective在追踪（分数才同步给客户端）

src/main/java/com/github/zly2006/carpetslsaddition/util/BoardManager.java

@@ -89,6 +89,11 @@ public final class BoardManager {
         if (deaths == null && mined == null) {
             return;
         }
+        // 确保 objective 在追踪（分数才会同步给客户端）
+        if (sb instanceof net.minecraft.server.ServerScoreboard ssb) {
+            if (deaths != null) ssb.startTrackingObjective(deaths);
+            if (mined != null) ssb.startTrackingObjective(mined);
+        }
         for (ServerPlayer player : server.getPlayerList().getPlayers()) {
             ServerStatsCounter counter = player.getStats();
             setScore(sb, deaths, player, totalDeaths(counter));