Fix payment server: remove global conRide to prevent crashing non-ride DB queries

backend/temp_schema.php

@@ -0,0 +1,10 @@
+<?php
+require_once __DIR__ . '/connect.php';
+try {
+    $con_ride = Database::get('ride');
+    $stmt = $con_ride->query("DESCRIBE ride");
+    $columns = $stmt->fetchAll(PDO::FETCH_ASSOC);
+    print_r($columns);
+} catch (Exception $e) {
+    echo "Error: " . $e->getMessage();
+}