Take a look at singleFile - a project that lets you save the entire webpage. It has an integration for saving the hash if the page on a Blockchain. You can choose to set it up between parties who're interested in the provenance of the authenticity.

Thank you. It's mostly because of costs (free tier).

I mostly use KV for storing flags specific to each project (which gets replicated automatically). Everything else goes to D1 (replication isn't needed here).

Cloudflare queues was something I might consider for async workflows.