Thanks for the PR, please make sure it is based on the latest master state and then do a composer i and ./build/openapi-checker.sh. That should remove all the unintended OpenAPI changes.

Also the changes in lib/composer have to be reverted

Ah I see what is going on, the lockfiles in vendor-bin have been changed and that is causing the OpenAPI changes. So please remove all changes except for lib/public.

/backport to stable30

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22