优化fix脚本

@@ -229,10 +229,12 @@ def main():
     print(f"移除行数: {len(removed)}（同歌手且时长相近）")
     print(f"保留行数: {len(kept)}")
 
-    # 写修复后的 CSV
+    # 写修复后的 CSV（去掉冗余列）
+    DROP_COLS = {"topk_hit", "expected_duplicate", "predicted_duplicate", "sample_class"}
+    out_fieldnames = [f for f in fieldnames if f not in DROP_COLS]
     out_path = Path(args.output)
     with out_path.open("w", newline="", encoding="utf-8") as f:
-        writer = csv.DictWriter(f, fieldnames=fieldnames)
+        writer = csv.DictWriter(f, fieldnames=out_fieldnames, extrasaction="ignore")
         writer.writeheader()
         writer.writerows(kept)
     print(f"已写入: {out_path}")