Feature Request: New Lets Encrypt dns-persist-01 Challange

Is your feature request related to a problem? Please describe.

I deployed NPM on a VPS and It would be really nice to use DNS Validation without the need of configuring DNS API Keys for that. My API provider doesn't let me break down permissions for a key so its basically full access.

Describe the solution you'd like

As far as I understand this is solved by this new LetsEncrypt Validation Method:
https://letsencrypt.org/2026/02/18/dns-persist-01

So it would be really nice if this could be implemented in future releases

Additional context

The Method is not rolled out yet but will come in the next months

Support for the draft specification is available now in Pebble, a miniature version of Boulder, our production CA software. Work is also in progress on a lego-cli client implementation to make it easier for subscribers to experiment with and adopt. Staging rollout is planned for late Q1 2026, with a production rollout targeted for some time in Q2 2026.

Start by reading the linked Let's Encrypt dns-persist-01 specification and checking the repository's certificate-validation entry points; no implementation files or tests are named in the issue. Use Pebble and the lego-cli work as reference for the draft behavior, and define done as support for the method without requiring broad DNS API keys.