feat: machine mode, ECH subscriptions, batch ops & security hardening

app/Models/ServerMachine.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Str;
+
+/**
+ * App\Models\ServerMachine
+ *
+ * @property int $id
+ * @property string $name 机器名称
+ * @property string $token 认证 Token
+ * @property string|null $notes 备注
+ * @property bool $is_active 是否启用
+ * @property int|null $last_seen_at 最后心跳时间
+ * @property array|null $load_status 负载状态
+ * @property \Illuminate\Support\Carbon $created_at
+ * @property \Illuminate\Support\Carbon $updated_at
+ *
+ * @property-read \Illuminate\Database\Eloquent\Collection<int, Server> $servers 关联的节点
+ */
+class ServerMachine extends Model
+{
+    protected $table = 'v2_server_machine';
+
+    protected $guarded = ['id'];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+        'last_seen_at' => 'integer',
+        'load_status' => 'array',
+        'created_at' => 'timestamp',
+        'updated_at' => 'timestamp',
+    ];
+
+    protected $hidden = ['token'];
+
+    public function servers(): HasMany
+    {
+        return $this->hasMany(Server::class, 'machine_id');
+    }
+
+    public function loadHistory(): HasMany
+    {
+        return $this->hasMany(ServerMachineLoadHistory::class, 'machine_id');
+    }
+
+    /**
+     * 生成新的随机 Token
+     */
+    public static function generateToken(): string
+    {
+        return Str::random(32);
+    }
+
+    /**
+     * 更新最后心跳时间
+     */
+    public function updateHeartbeat(): bool
+    {
+        return $this->forceFill(['last_seen_at' => now()->timestamp])->save();
+    }
+}