rl-2411: document new setting required for shiori

  for `stateVersion` ≥ 24.11. (It was previously using SQLite for structured

  data and the filesystem for blobs).

- The `shiori` service now requires an HTTP secret value `SHIORI_HTTP_SECRET_KEY` to be provided via environment variable. The nixos module therefore, now provides an environmentFile option:

  ```

  # This is how a environment file can be generated:

  # $ printf "SHIORI_HTTP_SECRET_KEY=%s\n" "$(openssl rand -hex 16)" > /path/to/env-file

  services.shiori.environmentFile = "/path/to/env-file";

  ```

- `libe57format` has been updated to `>= 3.0.0`, which contains some backward-incompatible API changes. See the [release note](https://github.com/asmaloney/libE57Format/releases/tag/v3.0.0) for more details.

- `gitlab` deprecated support for *runner registration tokens* in GitLab 16.0, disabled their support in GitLab 17.0 and will