Refactor file handling in BuyProduct and Request models; implement file schema for better structure. Update routes to handle file uploads and downloads with improved error handling and logging. Adjust MongoDB connection management across scripts and routes for consistency.

server/routers/procurement/routes/companies.js

@@ -5,7 +5,8 @@ const Company = require('../models/Company');
 const Experience = require('../models/Experience');
 const Request = require('../models/Request');
 const Message = require('../models/Message');
-const { Types } = require('mongoose');
+const mongoose = require('../../../utils/mongoose');
+const { Types } = mongoose;
 
 // GET /my/info - получить мою компанию (требует авторизации) - ДОЛЖНО быть ПЕРЕД /:id
 router.get('/my/info', verifyToken, async (req, res) => {