Onyxia api could do better caching strategy when remote helm charts repository of catalogs are offline

I have some onyxia catalog that are put in a gitlab helm registry.

When gitlab was on maintenance and the registry offline i could scroll catalog services but when i clicked on start a service it seems that onyxia- api failed to fetch registry and then the service is an error.

Onyxia could probably like CatalogRefresh do a better strategy to cache packages tar.gz in order to handle an offline helm registry when the catalog was already downloaded.