feat: queue-based graph engine

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/plugin/backwards_invocation/app.py

@@ -164,7 +164,6 @@ class PluginAppBackwardsInvocation(BaseBackwardsInvocation):
             invoke_from=InvokeFrom.SERVICE_API,
             streaming=stream,
             call_depth=1,
-            workflow_thread_pool_id=None,
         )
 
     @classmethod

api/core/plugin/backwards_invocation/node.py

@@ -1,5 +1,5 @@
 from core.plugin.backwards_invocation.base import BaseBackwardsInvocation
-from core.workflow.nodes.enums import NodeType
+from core.workflow.enums import NodeType
 from core.workflow.nodes.parameter_extractor.entities import (
     ModelConfig as ParameterExtractorModelConfig,
 )