Investigate remote access by `rook`: e.g. object store, HTTP download/caching, etc.

[cehbrecht]

We are working some diagrams to understand the issues and dependencies:

https://github.com/ESGF/esgf-cwt/tree/main/drawio

Need to also add in this check:

• Version or remote rook is compatible with local rook - we might define rules for this.