chore: initialize wygj monorepo

backend/script/sql/update/update_5.5.1-5.5.2.sql

@@ -0,0 +1,3 @@
+ALTER TABLE flow_node MODIFY COLUMN node_ratio varchar(200) NULL COMMENT '流程签署比例值';
+ALTER TABLE flow_node DROP COLUMN handler_type;
+ALTER TABLE flow_node DROP COLUMN handler_path;