🔄 refactor: Consolidate Tokenizer; Fix Jest Open Handles (#5175)

* refactor: consolidate tokenizer to singleton

* fix: remove legacy tokenizer code, add Tokenizer singleton tests

* ci: fix jest open handles

api/server/routes/__tests__/config.spec.js

@@ -1,3 +1,4 @@
+jest.mock('~/cache/getLogStores');
 const request = require('supertest');
 const express = require('express');
 const routes = require('../');