This is a broad issue that is likely to entail multiple subordinate issues.

Tied to the overall goal of allowing read-only DB clones

Involves source code from the "civicrm-backdrop" git repo

Involves source code from the "civicrm-core" git repo

Involves source code from the "civicrm-drupal" git repo

Involves source code from the "civicrm-joomla" git repo

Involves source code from the "civicrm-packages" git repo

Involves source code from the "civicrm-setup" git repo

Involves source code from the "civicrm-wordpress" git repo

Involves source code from the "cv" git repo

Further clarification or other questions have been asked, someone has eye on the issue