fix: 调整边缘过滤参数，修正 crop_padding 对应的计算逻辑

ocr_tools/universal_doc_parser/models/adapters/wired_table/grid_recovery.py

@@ -223,7 +223,7 @@ class GridRecovery:
         # - 因此 mask 坐标系中的 padding = crop_padding × upscale
         # - edge_margin 应略大于 padding，以确保能过滤边缘噪声
         #
-        edge_margin = int((crop_padding-1) * upscale * 1)  # padding
+        edge_margin = int((crop_padding-4) * upscale * 1)  # padding
         logger.info(
             f"   🔧 边缘过滤参数: crop_padding={crop_padding}px (原图坐标系), "
             f"upscale={upscale:.3f}, "