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/buy.js

@@ -1,10 +1,11 @@
 const express = require('express')
 const fs = require('fs')
+const path = require('path')
 const router = express.Router()
 const BuyDocument = require('../models/BuyDocument')
 
 // Create remote-assets/docs directory if it doesn't exist
-const docsDir = 'server/remote-assets/docs'
+const docsDir = 'server/routers/remote-assets/docs'
 if (!fs.existsSync(docsDir)) {
   fs.mkdirSync(docsDir, { recursive: true })
 }