Refine invitation email validation and expiration scopes#966

rsmithlal wants to merge 2 commits intomainbetter-together-org/community-engine-rails:mainfrom

codex/refactor-invitation-model-validations-and-scopesbetter-together-org/community-engine-rails:codex/refactor-invitation-model-validations-and-scopesCopy head branch name to clipboard