As part of our focus on Scalability, this focuses on the UX of the Kiali Traffic Graph. Once the initial graph is established, we want to compute updates to the graph on the server-side, caching the results. This should make subsequent client requests very fast [for the same graph, just advancing the time period]. Currently, graphs are generated at request time, potentially making the client wait a substantial amount of time.

Note that this is only for namespace graphs, not node graphs (which includes graphs on the detail pages). It also has no effect on graph replay, it's only for advancing the current time period.

This work can be tracked upstream via https://github.com/kiali/kiali/issues/8871