fix(workflow): temporarily ignore non-text fields in knowledge retrieval node

api/app/core/workflow/nodes/knowledge/node.py

@@ -203,15 +203,16 @@ class KnowledgeRetrievalNode(BaseNode):
                         rs2 = vector_service.search_by_full_text(query=query, top_k=kb_config.top_k,
                                                                  indices=indices,
                                                                  score_threshold=kb_config.similarity_threshold)
-                        # Deduplicate hybrid retrieval results
+                        # Deduplicate hy    brid retrieval results
                         unique_rs = self._deduplicate_docs(rs1, rs2)
                         vector_service.reranker = self.get_reranker_model()
                         rs.extend(vector_service.rerank(query=query, docs=unique_rs, top_k=kb_config.top_k))
                     case _:
                         raise RuntimeError("Unknown retrieval type")
             vector_service.reranker = self.get_reranker_model()
+            # TODO：其他重排序方式支持
             final_rs = vector_service.rerank(query=query, docs=rs, top_k=self.typed_config.reranker_top_k)
             logger.info(
                 f"Node {self.node_id}: knowledge base retrieval completed, results count: {len(final_rs)}"
             )
-            return [chunk.model_dump() for chunk in final_rs]
+            return [chunk.page_content for chunk in final_rs]