fix serialization column processing in resultsToWorkflowStatus (#289)

Also add moar tests

Author: devhawk

transact/src/main/java/dev/dbos/transact/database/WorkflowDAO.java

@@ -589,7 +589,7 @@ private static WorkflowStatus resultsToWorkflowStatus(
             rs.getString("queue_partition_key"),
             rs.getString("forked_from"),
             rs.getString("parent_workflow_id"),
-            rs.getString("serialization"));
+            serialization);
     return info;
   }