Summary

Following the Cucumber-js v12 upgrade in #7221, there are still 6 script files using .cjs extension
that can be converted to native ESM .js files.

Files to Convert

• scripts/md5sum.cjs → scripts/md5sum.js
• scripts/osm2cucumber.cjs → scripts/osm2cucumber.js
• scripts/osrm-runner.cjs → scripts/osrm-runner.js
• scripts/poly2req.cjs → scripts/poly2req.js
• scripts/timer.cjs → scripts/timer.js
• scripts/validate_changelog.cjs → scripts/validate_changelog.js

Conversion Requirements

1. Change file extensions from .cjs to .js
2. Update imports:
   • var fs = require('fs') → import fs from 'fs'
   • const crypto = require('crypto') → import crypto from 'crypto'
   • var parseString = require('xml2js').parseString → import { parseString } from 'xml2js'
   • etc.
3. Update any references in other files (Makefiles, documentation, shell scripts, etc.)