feat/trigger: support specifying root node (#24388)

Co-authored-by: Claude <noreply@anthropic.com>

api/services/async_workflow_service.py

@@ -110,6 +110,7 @@ class AsyncWorkflowService:
             tenant_id=trigger_data.tenant_id,
             app_id=trigger_data.app_id,
             workflow_id=workflow.id,
+            root_node_id=trigger_data.root_node_id,
             trigger_type=trigger_data.trigger_type,
             trigger_data=trigger_data.model_dump_json(),
             inputs=json.dumps(dict(trigger_data.inputs)),

api/services/workflow/entities.py

@@ -25,6 +25,7 @@ class TriggerData(BaseModel):
     app_id: str
     tenant_id: str
     workflow_id: Optional[str] = None
+    root_node_id: str
     inputs: Mapping[str, Any]
     files: Sequence[Mapping[str, Any]] = Field(default_factory=list)
     trigger_type: WorkflowRunTriggeredFrom