fix: 修复导入路径，更新compare_ocr_results模块的引用

streamlit_validator_cross.py

@@ -8,7 +8,7 @@ from pathlib import Path
 from io import BytesIO
 import plotly.express as px
 
-from compare_ocr_results import compare_ocr_results
+from comparator import compare_ocr_results
 from ocr_validator_utils import get_data_source_display_name