feat: contacts and voucher assignment

app/api/vouchers/[id]/route.ts

@@ -6,7 +6,7 @@ export async function GET(_req: NextRequest, { params }: { params: Promise<{ id:
   const numId = Number(id);
   if (!Number.isInteger(numId)) return NextResponse.json({ error: "not found" }, { status: 404 });
   const db = getDb();
-  const v = await db.voucher.findUnique({ where: { id: numId } });
+  const v = await db.voucher.findUnique({ where: { id: numId }, include: { contacts: { include: { contact: true } } } });
   if (!v) return NextResponse.json({ error: "not found" }, { status: 404 });
   return NextResponse.json(v);
 }