Древовидные справочники: выбор колонки для дерева (treeColumnIndex) и API /rows/tree

shared/schema.ts

@@ -1842,6 +1842,7 @@ export const dataTables = pgTable("data_tables", {
   isDeleted: boolean("is_deleted").default(false),
   visibility: varchar("visibility", { length: 20 }).default("restricted"),
   folderId: integer("folder_id"),
+  treeColumnIndex: integer("tree_column_index"),
 }, (table) => ({
   folderIdx: index("data_tables_folder_idx").on(table.folderId),
 }));