🔄 fix: Ensure lastRefill Date for Existing Users & Refactor Balance Middleware (#9086)

- Deleted setBalanceConfig middleware and its associated file.
- Introduced createSetBalanceConfig factory function to create middleware for synchronizing user balance settings.
- Updated auth and oauth routes to use the new balance configuration middleware.
- Added comprehensive tests for the new balance middleware functionality.
- Updated package versions and dependencies in package.json and package-lock.json.
- Added balance types and updated middleware index to export new balance middleware.

api/server/routes/oauth.js

@@ -1,19 +1,20 @@
 // file deepcode ignore NoRateLimitingForLogin: Rate limiting is handled by the `loginLimiter` middleware
 const express = require('express');
 const passport = require('passport');
-const { isEnabled } = require('@librechat/api');
 const { randomState } = require('openid-client');
 const { logger } = require('@librechat/data-schemas');
 const { ErrorTypes } = require('librechat-data-provider');
-const {
-  checkBan,
-  logHeaders,
-  loginLimiter,
-  setBalanceConfig,
-  checkDomainAllowed,
-} = require('~/server/middleware');
+const { isEnabled, createSetBalanceConfig } = require('@librechat/api');
+const { checkDomainAllowed, loginLimiter, logHeaders, checkBan } = require('~/server/middleware');
 const { syncUserEntraGroupMemberships } = require('~/server/services/PermissionService');
 const { setAuthTokens, setOpenIDAuthTokens } = require('~/server/services/AuthService');
+const { getBalanceConfig } = require('~/server/services/Config');
+const { Balance } = require('~/db/models');
+
+const setBalanceConfig = createSetBalanceConfig({
+  getBalanceConfig,
+  Balance,
+});
 
 const router = express.Router();