Make state resolution more resistant and some sync performance improvements

See merge request famedly/conduit!490

ci: Adjust to current docker

See merge request famedly/conduit!488

bump ruma

See merge request famedly/conduit!489

fix rustc version, nix upkeep

See merge request famedly/conduit!482

Add relations endpoints, edits and threads work now

See merge request famedly/conduit!487

fix: send correct bearer token to appservices

Closes #358

See merge request famedly/conduit!486

fix: /context for element android. start and end must be set even with limit=0

See merge request famedly/conduit!485

Disable compression, see https://en.wikipedia.org/wiki/BREACH

See merge request famedly/conduit!484

feat: WIP relationships and threads

See merge request famedly/conduit!483

Looks like this should've happened as part of !479.

`nixos-unstable` is the rolling release channel of NixOS. The default is
the master branch, which doesn't always have a populated binary cache
and so may result in compiling a bunch of stuff unnecessarily.

chore(ci): Adjust to rust version bumps

See merge request famedly/conduit!479

fix: restricted room error is now FORBIDDEN

See merge request famedly/conduit!478

feat: support end to bridge encryption

See merge request famedly/conduit!454

fix nix readme to work with ipv6

See merge request famedly/conduit!475

Merge branch '350-debian-package-from-docker-packager-result-doesn-t-seem-to-install-configuration-files' into 'next'

Fix CI + Debian packaging

Closes #350

See merge request famedly/conduit!474

* Fix CI by explicitly setting hostname of docker in docker service
* Fix Docker build by bumping the Rust version to 1.69
* Fix cargo check in CI by bumping the Rust version to 1.69

Minor DEPLOY.md changes

See merge request famedly/conduit!473

Bump dependencies

See merge request famedly/conduit!472

Improvements to pushrules endpoints

Closes #316

See merge request famedly/conduit!461