fix: metadata filter not work (#19020)

Co-authored-by: 金鹏程 <jinpengcheng01@corp.netease.com>
Co-authored-by: crazywoola <427733928@qq.com>

api/core/agent/fc_agent_runner.py

@@ -45,6 +45,13 @@ class FunctionCallAgentRunner(BaseAgentRunner):
         # convert tools into ModelRuntime Tool format
         tool_instances, prompt_messages_tools = self._init_prompt_tools()
 
+        # fix metadata filter not work
+        if app_config.dataset is not None:
+            metadata_filtering_conditions = app_config.dataset.retrieve_config.metadata_filtering_conditions
+            for key, dataset_retriever_tool in tool_instances.items():
+                if hasattr(dataset_retriever_tool, "retrieval_tool"):
+                    dataset_retriever_tool.retrieval_tool.metadata_filtering_conditions = metadata_filtering_conditions
+
         assert app_config.agent
 
         iteration_step = 1