feat: make workflow messages resumable

backend/services/workflow/agent.py

@@ -109,25 +109,15 @@ class WorkflowAgentStage:
         leading_messages: list[dict[str, str]] | None = None,
     ) -> NodeConfig:
         data = self._engine.data(node_id)
-        entry_mode = str(data.get("entryMode") or "wait_user")
-        entry_speech = self._store.render(str(data.get("entrySpeech") or ""))
         strategy = (
             ContextStrategy.RESET
             if data.get("contextPolicy") == "fresh"
             else ContextStrategy.APPEND
         )
-        fixed_reply_messages = (
-            [{"role": "assistant", "content": entry_speech}]
-            if entry_mode == "fixed_speech" and entry_speech
-            else []
-        )
         return {
             "name": node_id,
             "role_message": self.role_message(node_id),
-            "task_messages": [
-                *(leading_messages or []),
-                *fixed_reply_messages,
-            ],
+            "task_messages": list(leading_messages or []),
             "functions": functions,
             "context_strategy": ContextStrategyConfig(strategy=strategy),
             # Direct node activations let WorkflowRuntime decide whether to run