Add database diagnostic export

backend/routes/databaseDiagnosticRoutes.js

@@ -0,0 +1,15 @@
+const express = require('express');
+const { verifySuperAdmin } = require('../auth');
+const { buildDatabaseDiagnostic } = require('../services/databaseDiagnosticService');
+
+const router = express.Router();
+
+router.get('/admin/database-diagnostic', verifySuperAdmin, async (req, res, next) => {
+    try {
+        res.json(await buildDatabaseDiagnostic(req.user));
+    } catch (error) {
+        next(error);
+    }
+});
+
+module.exports = router;