fix(vault): slug_hint, ghost-page guard, dedup proposals, warn on claim stub edits#220

Tet-9 wants to merge 2 commits into

vouchdev:testvouchdev/vouch:testfrom

Tet-9:fix/219-vault-to-kb-slug-and-guardsTet-9/vouch:fix/219-vault-to-kb-slug-and-guardsCopy head branch name to clipboard