feat(graph_engine): Support pausing workflow graph executions (#26585)

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

api/core/workflow/nodes/loop/loop_node.py

@@ -406,11 +406,12 @@ class LoopNode(Node):
 
     def _create_graph_engine(self, start_at: datetime, root_node_id: str):
         # Import dependencies
-        from core.workflow.entities import GraphInitParams, GraphRuntimeState
+        from core.workflow.entities import GraphInitParams
         from core.workflow.graph import Graph
         from core.workflow.graph_engine import GraphEngine
         from core.workflow.graph_engine.command_channels import InMemoryChannel
         from core.workflow.nodes.node_factory import DifyNodeFactory
+        from core.workflow.runtime import GraphRuntimeState
 
         # Create GraphInitParams from node attributes
         graph_init_params = GraphInitParams(