As a card-carrying librarian, I recommend using Zotero as a client with a WebDAV backend (I use Nextcloud).
If you’re studying or writing anything in which you need to cite your sources, Zotero is excellent and has integrations with many word processors. I’m pretty sure it can output your references as BibTeX if you’re in one of the disciplines that uses LaTeX.
Sorry, you didn't go into any detail about why you can't automate the process of detecting changes in web pages, so I'm going to offer an automation suggestion anyway:
Like some others, I have separate storage and compute servers.
The data directory is an NFS share on my storage server and I run Nextcloud in docker on my compute server.
I have the NFS share defined as a volume of type nfs in the docker compose, mounted to /var/www/html/data. Nextcloud itself just treats it like a local directory.
I’m using Autorestic, a wrapper for Restic that lets you specify everything in a config file. It can fire hooks before/after backups so I’ve added it to my healthchecks instance to know if backups were completed successfully.
One caveat with Restic: it relies on hostnames to work optimally (for incremental backups) so if you’re using Autorestic in a container, set the host: option in the config file. My backups took a few hours each night until I fixed this - now they’re less than 30 minutes.
I've done a couple of host migrations since using Docker for all my services.
I don't even bother with database dumps or anything like that, I copy my compose files and mapped directories, being sure to preserve permissions, and all my services come back up without any issues.
As a card-carrying librarian, I recommend using Zotero as a client with a WebDAV backend (I use Nextcloud).
If you’re studying or writing anything in which you need to cite your sources, Zotero is excellent and has integrations with many word processors. I’m pretty sure it can output your references as BibTeX if you’re in one of the disciplines that uses LaTeX.