text: const mongoose = require('mongoose');
  
  const TimetableStopOrder = mongoose.model('TimetableStopOrder', new mongoose.Schema({
    created_at: {
      type: Date,
      default: Date.now,
      required: true
    },
    agency_key: {
      type: String,
      required: true,
      index: true
    },
    timetable_id: {
      type: String,
      index: true
    },
    stop_id: String,
    stop_sequence: Number
  }));
  
  module.exports = TimetableStopOrder;
  