enhancment complete with phase 10

apps/admin/src/app/api/attendance/check-in/route.ts

@@ -1,10 +1,15 @@
 import { auth } from "@clerk/nextjs/server";
-import { NextResponse } from "next/server";
+import { NextRequest, NextResponse } from "next/server";
 import { getDatabase } from "@/lib/database";
 import { ensureUserSynced } from "@/lib/sync-user";
 import log from "@/lib/logger";
+import { checkInSchema } from "@/lib/validation/schemas";
+import {
+  validateRequestBody,
+  validationErrorResponse,
+} from "@/lib/validation/helpers";
 
-export async function POST(req: Request) {
+export async function POST(req: NextRequest) {
   try {
     const { userId } = await auth();
     if (!userId) return new NextResponse("Unauthorized", { status: 401 });