Where is underlying data for the plots stored?

I.e., the analog of https://github.com/dandi/access-summaries if I wanted to make my own plots with the same data without having to run my own custom code/CRON

The issue names no repository files, tests, or entry points; start by tracing how the plots obtain their underlying data and compare that source with the linked dandi/access-summaries project. Document the storage location and a way to reuse the same data without custom code or CRON, once the source is confirmed.

Written by the indexing model from the issue text.