feat(worker): add autosync scheduler, endpoint, locking and UI controls

app/api/cron/autosync/route.ts

@@ -0,0 +1,38 @@
+import { NextResponse } from "next/server";
+
+import { env } from "@/lib/env";
+import { runAutoSyncTick } from "@/lib/plesk/auto-sync";
+import { createSupabaseAdminClient } from "@/lib/supabase/admin";
+
+export async function POST(req: Request) {
+  const startedAt = Date.now();
+
+  try {
+    const secret = req.headers.get("x-cron-secret");
+    if (!env.cronSecret || !secret || secret !== env.cronSecret) {
+      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+    }
+
+    const supabase = createSupabaseAdminClient() as any;
+    const summary = await runAutoSyncTick(supabase);
+
+    return NextResponse.json({
+      ...summary,
+      duration_ms: Date.now() - startedAt,
+    });
+  } catch (error) {
+    console.error("[autosync cron] failed", error);
+
+    return NextResponse.json(
+      {
+        error: "Auto-sync job failed",
+        instances_considered: 0,
+        locks_acquired: 0,
+        succeeded: 0,
+        failed: 0,
+        duration_ms: Date.now() - startedAt,
+      },
+      { status: 500 },
+    );
+  }
+}