fix(solver): bugfix SPO Retrieval LLM response parse (#378)

* bugfix official_name node has same prop object

* reformat by black

* adapter spo retrieval llm response

kag/solver/prompt/default/spo_retrieval.py

@@ -112,6 +112,8 @@ class SpoRetrieval(PromptABC):
             f"SpoRetrieval {response} mention:{self.template_variables_value.get('mention', '')} "
             f"candis:{self.template_variables_value.get('candis', '')}"
         )
+        if isinstance(response, list):
+            return response
         if not isinstance(response, dict):
             return []
         if "output" in response: