Serialize Spark local revisions

Concurrent outgoing changes could allocate the same local revision and
write to the same sync queue key. Serialize revision allocation so each
pending change gets a distinct storage key.

Author: benthecarman

orange-sdk/src/trusted_wallet/spark/mod.rs

@@ -333,7 +333,7 @@ impl Spark {
 			},
 		};
 
-		let spark_store = Arc::new(spark_store::SparkStore(store));
+		let spark_store = Arc::new(spark_store::SparkStore::new(store));
 		let builder = SdkBuilder::new(spark_config, seed).with_storage(spark_store);
 
 		let spark_wallet = Arc::new(builder.build().await.map_err(|e| {