Display estimated size for each container registry repository
Problem to solve
Currently we only show the estimated size for each tag. It would be useful to display the estimated size of each repository.
Proposal
Given that GitLab fetches all tags and their estimated size whenever a container repository is expanded, we could sum the size of each tag and display the result (estimated repository size) alongside each repository:
We should make it clear that this is an estimate. A repository may be using more disk space that this value, as there might be dangling blobs that were not yet garbage collected.