This issue aims to address the need for limiting concurrency in processing markdown files to improve performance and prevent potential resource exhaustion.

Currently, scripts/markdown/check-markdown.js processes markdown files asynchronously without a concurrency limit, which could lead to too many open file handles and impact system resources.

As discussed in PR #3378 and the related comment, it's important to implement concurrency control in the script.

Assigning to @akshatnema for further action.