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sync_state_machine/domain/material/sync_strategy.py

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+from ...sync_system.strategy import DefaultSyncStrategy
+from ...sync_system.config import StrategyConfig, OrphanAction, UpdateDirection
+from schemas.material.material import MaterialResponse
+
+
+class MaterialSyncStrategy(DefaultSyncStrategy[MaterialResponse]):
+    """
+    Material 同步策略（合同子业务）。
+    """
+
+    schema = MaterialResponse
+
+    default_config = StrategyConfig(
+        auto_bind=True,
+        auto_bind_fields=["contract_id", "material_type"],
+        depend_fields={"contract_id": "contract", "project_id": "project"},
+        local_orphan_action=OrphanAction.CREATE_REMOTE,
+        remote_orphan_action=OrphanAction.NONE,
+        update_direction=UpdateDirection.PUSH,
+    )