fix(api): Ensure is_resumption for node_started event is correctly set

api/core/workflow/graph_engine/domain/graph_execution.py

@@ -236,3 +236,10 @@ class GraphExecution:
     def record_node_failure(self) -> None:
         """Increment the count of node failures encountered during execution."""
         self.exceptions_count += 1
+
+    def is_node_resumption(self, node_id: str, execution_id: str) -> bool:
+        """Return True if the node is resuming a previously started execution."""
+        node_execution = self.node_executions.get(node_id)
+        if not node_execution or not node_execution.execution_id:
+            return False
+        return str(node_execution.execution_id) == execution_id

api/core/workflow/graph_engine/event_management/event_handlers.py

@@ -131,9 +131,6 @@ class EventHandler:
         node_execution.mark_started(event.id)
         self._graph_runtime_state.increment_node_run_steps()
 
-        # Mark whether this start is part of a resume flow
-        event.is_resumption = self._graph_runtime_state.consume_resuming_node(event.node_id)
-
         # Track in response coordinator for stream ordering
         self._response_coordinator.track_node_execution(event.node_id, event.id)