LLMs are absolutely the right thing to look at for migrating hundreds of "simple" workflows like this.

The hard work will be validating that the code they write for you is exactly right. You would have to do that if you wrote the code yourself, too. The LLMs will accelerate the writing-the-code part but the manual QA work will still be on you: https://simonwillison.net/2025/Mar/11/using-llms-for-code/#y...