fix: handle KeyError when accessing rules in CleanProcessor.clean (langgenius#10258)

Author: pinsily

api/core/indexing_runner.py

@@ -598,7 +598,7 @@ def _document_clean(text: str, processing_rule: DatasetProcessRule) -> str:
             rules = DatasetProcessRule.AUTOMATIC_RULES
         else:
             rules = json.loads(processing_rule.rules) if processing_rule.rules else {}
-        document_text = CleanProcessor.clean(text, rules)
+        document_text = CleanProcessor.clean(text, {"rules": rules})
 
         return document_text