feat(timer): 新增 run_type 调度、host_id 投递和日志清理

T7: TimerBase shouldExecuteTask() - main/auto/all/manual/disabled modes
    with two-phase DB row lock for auto mode
T8: TimerControllerBase - host_id param, logStart/logEnd methods
    TimerServiceBase - inject host_id into site URLs
T9: TimerLogClean command - php think admin:timer:log:clean --days=30

extend/base/common/command/admin/timer/TimerLogCleanBase.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace base\common\command\admin\timer;
+
+use app\common\console\Command;
+use think\console\Input;
+use think\console\input\Option;
+use think\console\Output;
+use think\facade\Db;
+
+class TimerLogCleanBase extends Command
+{
+    protected function configure()
+    {
+        parent::configure();
+        $this->setName('admin:timer:log:clean')
+            ->addOption('days', 'd', Option::VALUE_OPTIONAL, '清理多少天前的日志', 30)
+            ->setDescription('清理定时器执行日志');
+    }
+
+    protected function execute(Input $input, Output $output)
+    {
+        $days = (int) $input->getOption('days');
+        $threshold = time() - ($days * 86400);
+
+        $count = Db::name('system_timer_log')
+            ->where('create_time', '<', $threshold)
+            ->delete();
+
+        $output->writeln("已清理 {$count} 条超过 {$days} 天的定时器执行日志。");
+    }
+}