paperless-ng: fix redis connection

[Flakebi]

Motivation for this change

paperless-ng is not yet compatible with aioredis 2, which was updated
with the last python update, so pin its version to 1.3.1.

Note that #138294 is needed to build ocrmypdf/paperless-ng.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• 21.11 Release Notes (or backporting 21.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[dotlambda]

LGTM, but didn't run the software

[dotlambda]

@ofborg eval

[dotlambda]

Do you have an idea about why two tests fail on aarch64?

[Flakebi]

No idea, it looks like somehow the consumed file is incomplete or corrupted as it fails here: https://github.com/jonaswinkler/paperless-ng/blob/cd43bc1f660f081325c3d03e758cf9436d3e604f/src/documents/tests/test_management_consumer.py#L78

[dotlambda]

Do you mind filing an issue upstream?

[Flakebi]

I just had a look at the initial pr (#123046) and aarch64 tests failed there too, so it’s not a regression. If I find the time, I’ll look more at the failures.