AI facial recognition is already added in version 13.0 (Seafile AI extension - Seafile Admin Manual)
Regarding the posts:
Here’re related posts:
(done) /t/photos-gallery-timeline/11374
/t/mobile-app-adding-delete-after-upload-on-picture-video-files/23149
(done) /t/seafile-video-player/22636
(done) /t/can-this-replace-google-drive-photos/13956
(done) /t/provide-a-thumbnailing-api/22842
So, in summary, I think most features are already implemented in version 13.0. Just give it a try and let me know what you are missing.