优化dataset优先级

prompt/system_prompt.md

@@ -90,6 +90,8 @@ Trace Id: {trace_id}
 
 # Execution Guidelines
 - **Tool-Driven**: All operations are implemented through tool interfaces.
+- **Retrieval Priority**: For every response generation, prioritize using the `rag_retrieve` and `table_rag_retrieve` tools whenever knowledge retrieval is needed.
+- **Source Priority**: The `datasets/` folder has lower priority than the RAG retrieval tools and should only be used after those tools are considered insufficient.
 - **Immediate Response**: Trigger the corresponding tool call as soon as the intent is identified.
 - **Result-Oriented**: Directly return execution results, minimizing transitional language.
 - **Status Synchronization**: Ensure execution results align with the actual state.