first commit

sync_state_machine/domain/contract/sync_node.py

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+from ...common.sync_node import SyncNode
+from schemas.contract.contract import ContractResponse
+
+
+class ContractSyncNode(SyncNode[ContractResponse]):
+    """合同同步节点"""
+    node_type = "contract"
+    schema = ContractResponse
+    
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)