feat(database): 添加用户角色权限系统及相关监控功能

- 创建用户表(users)包含基本信息和认证字段
- 创建角色表(roles)用于权限控制
- 创建权限表(permissions)定义系统权限
- 创建用户角色关联表(user_roles)建立用户与角色关系
- 创建角色权限关联表(role_permissions)建立角色与权限关系
- 创建迁移记录表(migrations)追踪数据库变更
- 添加AdminController提供管理员面板功能
- 实现系统监控、配置管理、缓存清理等功能
- 添加AOP切面编程支持的各种通知类型
- 实现告警管理AlertManager支持多渠道告警
- 添加文档注解接口规范

app/Dao/UserDao.php

@@ -0,0 +1,106 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Dao;
+
+use Fendx\Core\Annotation\Dao;
+use App\Entity\User;
+use Fendx\Db\ORM\Model;
+
+#[Dao]
+class UserDao
+{
+    public function findById(int $id): ?User
+    {
+        return User::find($id);
+    }
+
+    public function findByEmail(string $email): ?User
+    {
+        return User::where('email', $email)->first();
+    }
+
+    public function findByUsername(string $username): ?User
+    {
+        return User::where('username', $username)->first();
+    }
+
+    public function findAllActive(): array
+    {
+        return User::where('status', 1)->orderBy('created_at', 'desc')->get();
+    }
+
+    public function findPaginated(int $page = 1, int $pageSize = 10): array
+    {
+        $offset = ($page - 1) * $pageSize;
+        
+        $users = User::orderBy('created_at', 'desc')
+            ->limit($pageSize)
+            ->offset($offset)
+            ->get();
+        
+        $total = User::count();
+        
+        return [
+            'users' => $users,
+            'total' => $total,
+            'page' => $page,
+            'pageSize' => $pageSize,
+            'totalPages' => ceil($total / $pageSize)
+        ];
+    }
+
+    public function create(array $data): User
+    {
+        $data['created_at'] = date('Y-m-d H:i:s');
+        $data['updated_at'] = date('Y-m-d H:i:s');
+        
+        return User::create($data);
+    }
+
+    public function update(int $id, array $data): bool
+    {
+        $data['updated_at'] = date('Y-m-d H:i:s');
+        
+        return User::find($id)?->update($data) ?? false;
+    }
+
+    public function delete(int $id): bool
+    {
+        return User::find($id)?->delete() ?? false;
+    }
+
+    public function count(): int
+    {
+        return User::count();
+    }
+
+    public function countActive(): int
+    {
+        return User::where('status', 1)->count();
+    }
+
+    public function search(string $keyword, int $page = 1, int $pageSize = 10): array
+    {
+        $offset = ($page - 1) * $pageSize;
+        
+        $users = User::where('username', 'LIKE', "%{$keyword}%")
+            ->orWhere('email', 'LIKE', "%{$keyword}%")
+            ->orderBy('created_at', 'desc')
+            ->limit($pageSize)
+            ->offset($offset)
+            ->get();
+        
+        $total = User::where('username', 'LIKE', "%{$keyword}%")
+            ->orWhere('email', 'LIKE', "%{$keyword}%")
+            ->count();
+        
+        return [
+            'users' => $users,
+            'total' => $total,
+            'page' => $page,
+            'pageSize' => $pageSize,
+            'totalPages' => ceil($total / $pageSize)
+        ];
+    }
+}