Docs review for new multiple databases development doc
References
Merged MR that introduced documentation requiring review: !64289 (merged)
Related issue(s): #333527 (closed), &6168 (closed)
Further Details
Please see the MR description for context. https://gitlab.com/gitlab-org/gitlab/-/blob/eef66af99371745040255208e14e68ca13ed0e0b/doc/development/database/multiple_databases.md was the merged development doc. As this is the very first MR for what will be a months-long development effort, this doc will probably have lots of churn going forward.