MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

lib/Monolog/Formatter/ScalarFormatter.php

@@ -0,0 +1,51 @@
+<?php declare(strict_types=1);
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Formatter;
+
+/**
+ * Formats data into an associative array of scalar values.
+ * Objects and arrays will be JSON encoded.
+ *
+ * @author Andrew Lawson <adlawson@gmail.com>
+ */
+class ScalarFormatter extends NormalizerFormatter
+{
+    /**
+     * {@inheritDoc}
+     *
+     * @phpstan-return array<string, scalar|null> $record
+     */
+    public function format(array $record): array
+    {
+        $result = [];
+        foreach ($record as $key => $value) {
+            $result[$key] = $this->normalizeValue($value);
+        }
+
+        return $result;
+    }
+
+    /**
+     * @param  mixed                      $value
+     * @return scalar|null
+     */
+    protected function normalizeValue($value)
+    {
+        $normalized = $this->normalize($value);
+
+        if (is_array($normalized)) {
+            return $this->toJson($normalized, true);
+        }
+
+        return $normalized;
+    }
+}