When using app.use('/prefix', fn), the query string is stripped from req.url before it reaches the middleware.

This is a regression introduced in v9.2.0 by the GHSA-8p85-9qpw-fwgw fix. normalizedReqUrl is derived from normalizePathForMatching() which calls FindMyWay.sanitizeUrlPath() — this removes query strings. When req.url is rebuilt by stripping the matched prefix from normalizedReqUrl, the query string is already gone.

This fix preserves the query string suffix from the original req.url and re-appends it after prefix stripping.

Closes #248

Checklist

• run npm run test && npm run benchmark --if-present
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct