feat: add example cleanup-logs system task

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

server/plugins/03.scheduler.ts

@@ -1,4 +1,5 @@
 import { start, stop } from "../scheduler/engine";
+import "../scheduler/tasks/cleanup-logs";
 
 const MAX_CONCURRENCY = Number(process.env.SCHEDULER_MAX_CONCURRENCY) || 5;
 const LOG_RETENTION_DAYS = Number(process.env.SCHEDULER_LOG_RETENTION_DAYS) || 30;

server/scheduler/tasks/cleanup-logs.ts

@@ -0,0 +1,10 @@
+import { registerTask } from "../registry";
+import log4js from "logger";
+
+const logger = log4js.getLogger("SCHEDULER");
+
+registerTask("cleanup-logs", async (payload) => {
+  const days = (payload?.days as number) ?? 30;
+  logger.info("Log cleanup placeholder: would remove logs older than %d days", days);
+  return { success: true, message: `Cleaned logs older than ${days} days` };
+});