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Issue: Jackson deserialization fails when OverAllState.data contains ToolResponseMessage

Issue: Jackson deserialization fails when OverAllState.data contains ToolResponseMessage: a task in LegoFlow-SWE (Harbor dataset). Description When the graph state is persisted and later restored, deserializing an OverAllState instance throws an exception if its data map includes a messages list…

The task

**Description** When the graph state is persisted and later restored, deserializing an `OverAllState` instance throws an exception if its `data` map includes a `messages` list that contains a `ToolResponseMessage` (from Spring AI). This blocks any workflow that uses a React-style agent with tool responses, because…

Part of Lego-X/LegoFlow-SWE.