This was lost previously when switching it over to a read-only
implementation.
Implementing it with an ignore list will take time, 400ms in the GitLab
repository, but it's not slower than it was before and it is always
preferred to not dump objects into the ODB unnecessarily.
This type currently acts more or less like a command context that lives for the duration of the request. Regardless of if we wanna keep this pattern or not, separating it out helps us split up core
