Add sector classification module, integrate into all 7 scrapers, fix CF pagination

server.js

@@ -122,7 +122,7 @@ app.post('/api/auth/login', async (req, res) => {
 app.get('/api/tenders', verifyToken, async (req, res) => {
   try {
     const { search, sort, limit, offset, sources, min_value, max_value, deadline_days, sectors } = req.query;
-    let query = 'SELECT * FROM tenders WHERE status = $1';
+    let query = 'SELECT * FROM tenders WHERE status = $1 AND (deadline IS NULL OR deadline > NOW())';
     const params = ['open'];
     let paramIndex = 2;
 
@@ -162,7 +162,7 @@ app.get('/api/tenders', verifyToken, async (req, res) => {
     // Sector filter
     if (sectors) {
       const sectorList = sectors.split(',').map(s => s.trim());
-      const placeholders = sectorList.map(() => `$${paramIndex++}`).join(',');
+      const placeholders = sectorList.map(() => `$${paramIndex++}`).join(",");
       query += ` AND sector IN (${placeholders})`;
       params.push(...sectorList);
     }