feat: implement sensor connection endpoint and add pending tokens route

realtime/src/routes/sessions.js

@@ -0,0 +1,15 @@
+const router = require('express').Router();
+const db = require('../store/db');
+const { query } = require('../store/redis');
+
+router.get('/pendingtokens', (req, res) => {
+    try {
+        const pendingTokens = queryAll('snsr_pending_token');
+        res.json(pendingTokens);
+    } catch (err) {
+        console.error('Error fetching pending tokens', err);
+        res.status(500).json({ error: 'internal server error' });
+    }
+});
+
+module.exports = router;