Backend: Turn readme_html into markup_field

Summary

Currently, the readme_html field can't be cached properly.

Proposal

Turn readme_html into a proper markup_field to leverage the caching. This will require some refactoring and potentially figuring out why the requested_path isn't being sent to the concern.

Confirm purpose and User Reception (how does this benefit the user?)

Any logos in the Catalog will display properly always.

Additional details

Some relevant technical details, if applicable, such as:

• Does this need a feature flag?
• Does there need to be an associated instrumentation issue created related to this work?
• Is there an example response showing the data structure that should be returned (new endpoints only)?
• What permissions should be used?
• Is this EE or CE?
  • EE
  • CE
• Additional comments:

Implementation Table

Group	Issue Link
backend	Backend: CI/CD catalog can't render relative im... (#455516 - closed)
backend	👈 You are here

Links/References