Deploy workspaces should not be unique across all of Cachix

[Kranzes]

Right now the Cachix Deploy workspace has to be unique across all of Cachix, meaning if someone has a workspace called "nfra" (this is my case), another Cachix user cannot have his workspace also be called "infra". I think the solution could be to have it per-user like so:

(Suggestions for other URL endpoints are appreciated)
https://app.cachix.org/deploy/workspace/infra/ -> https://app.cachix.org/deploy/kranzes/workspace/infra/

https://app.cachix.org/deploy/workspace/homelab/ -> https://app.cachix.org/deploy/domenkozar/workspace/homelab/

another option is maybe https://app.cachix.org/deploy/workspace/kranzes/infra/