feat(canvas): 画布同步 - 新增操作事务、预演保存与并发恢复能力

backend/cmd/migrate-sqlite-postgres/main.go

@@ -441,6 +441,7 @@ func migrations() []tableMigration {
 		migrateTable[model.WorkflowStepTask]("workflow_step_tasks"),
 		migrateTable[model.ProductionTaskLink]("production_task_links"),
 		migrateTable[model.CanvasProject]("canvas_projects"),
+		migrateTable[model.CanvasMutationReceipt]("canvas_mutation_receipts"),
 		migrateTable[model.CanvasSnapshot]("canvas_snapshots"),
 		migrateTable[model.CanvasSnapshotResource]("canvas_snapshot_resources"),
 		migrateTable[model.CanvasShare]("canvas_shares"),