Fix: KeyError: 'table_body' of mineru parser #10769

### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)

Author: TeslaZY

deepdoc/parser/mineru_parser.py

@@ -254,9 +254,9 @@ def _transfer_to_sections(self, outputs: list[dict[str, Any]]):
                 case MinerUContentType.TEXT:
                     section = output["text"]
                 case MinerUContentType.TABLE:
-                    section = output["table_body"] + "\n".join(output["table_caption"]) + "\n".join(output["table_footnote"])
+                    section = output.get("table_body", "") + "\n".join(output.get("table_caption", [])) + "\n".join(output.get("table_footnote", []))
                 case MinerUContentType.IMAGE:
-                    section = "".join(output["image_caption"]) + "\n" + "".join(output["image_footnote"])
+                    section = "".join(output.get("image_caption", [])) + "\n" + "".join(output.get("image_footnote", []))
                 case MinerUContentType.EQUATION:
                     section = output["text"]