refactor(nix,postgres): update initial database setup to use structured configuration to improving readability and maintainability

[JakobLichterfeld]

Refactor the initial database setup to utilize a more structured approach with an array of initialDatabases, improving readability and maintainability.

[netlify]

✅ Deploy Preview for teslamate ready!

Name	Link
🔨 Latest commit	9d9df9f
🔍 Latest deploy log	https://app.netlify.com/projects/teslamate/deploys/6a0b0cc29a25220008ea55f9
😎 Deploy Preview	https://deploy-preview-5337--teslamate.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[JakobLichterfeld]

initialDatabases is not in NixOS 25.11, therefore we need to wait with this till it is releases

[brianmay]

I would really like to update this sometime to use the socket connection to the database by default rather then the TCP connection. Not only is there likely to be a tiny performance gain, but means there is one less password to worry about.

Not sure about grafana though, is that supports socket connections or not. And it probably should have a dedicated postgresql user too.

Don't know if any of this is in scope for this change or not. But maybe something to think about.

[JakobLichterfeld]

Exactly. I wonder the same, would it be possible to use socket connection and grafana (yes I do it similar with Prometheus in my homelab) and TeslaMate as well to connect to the DB at the same time? Why not.

As it seems like the options I tried to use won't be available (old links in mynixos.com) I will look more into it.

[JakobLichterfeld]

As it seems like the options I tried to use won't be available (old links in mynixos.com) I will look more into it.

Replaced with the familiar once and use ensureClauses for superuser and password set. The latter needs testing.