feat(timer): 新增定时器配置、日志和主机的后台管理界面

T10: TimerConfig CURD - task management with run_type/status editing,
     manual trigger button, task_name read-only, no add/delete
T11: TimerLog CURD - read-only log viewer with filters and color badges
T12: Host list enhanced - is_master column, setMaster button

app/admin/model/SystemTimerLog.php

@@ -2,11 +2,30 @@
 
 namespace app\admin\model;
 
-use think\Model;
+use app\common\model\TimeModel;
 
-class SystemTimerLog extends Model
+/**
+ * @property int $id  
+ * @property string $task_name 任务名称 
+ * @property string $node_id 执行节点ID 
+ * @property string $run_type 运行类型 
+ * @property int $start_time 开始时间戳 
+ * @property int $end_time 结束时间戳 
+ * @property int $duration 耗时 
+ * @property string $status 状态:running/success/error 
+ * @property string $error_message 错误信息 
+ * @property int $concurrency_id 并发分片ID 
+ * @property int $create_time 创建时间 
+ */
+class SystemTimerLog extends TimeModel
 {
-    protected $name = 'system_timer_log';
 
-    protected $autoWriteTimestamp = true;
+    protected $name = "system_timer_log";
+
+    protected $deleteTime = false;
+
+    
+    
+    
+
 }