Per this thread, the instructions I wrote for ingesting a new refcat are incorrect for `/repo/main` (which is the primary use case, I suspect). The refcats collection is a `CHAINED` collection in `/repo/main`, so we can't ingest directly into it; instead we need to ingest into a new RUN collection and CHAIN it back to refcats.

The ingest-files command in the docs and what is output by convertReferenceCatalog should replace refcats with refcats/TICKET-NNNNN or something similar, and have a paragraph about that. We also need a final command to chain this new collection back to the refcats collection. I'll update the ticket once I know what the correct command is there.

We should also link to the note about refcats in DMTN-167.