feat: wire scheduler lifecycle into Nitro plugin

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

.env.example

@@ -2,3 +2,5 @@ DATABASE_URL=file:./db.sqlite
 STATIC_DIR=static
 UPLOAD_SUBDIR=upload
 NITRO_PORT=3399
+SCHEDULER_MAX_CONCURRENCY=5
+SCHEDULER_LOG_RETENTION_DAYS=30

server/plugins/03.scheduler.ts

@@ -0,0 +1,16 @@
+import { start, stop } from "../scheduler/engine";
+
+const MAX_CONCURRENCY = Number(process.env.SCHEDULER_MAX_CONCURRENCY) || 5;
+const LOG_RETENTION_DAYS = Number(process.env.SCHEDULER_LOG_RETENTION_DAYS) || 30;
+
+if (import.meta.dev) {
+  console.log("plugin: 03.scheduler");
+}
+
+export default defineNitroPlugin(async (nitroApp) => {
+  await start(MAX_CONCURRENCY, LOG_RETENTION_DAYS);
+
+  nitroApp.hooks.hook("close", async () => {
+    await stop();
+  });
+});