v0.1.0-alpha.258

What's Changed

• docs(#1920): CW-v1 content-workflow design spec by @jonesrussell in #1921
• feat(#1920): CW-v1 WP-2 — safe substrate (node revisions, pointer guard, backfill); forward drafts deferred by @jonesrussell in #1932
• chore: remove the auto-merge milestone gate by @jonesrussell in #1933
• docs(#1934): changelog entry for the alpha.258 re-cut by @jonesrussell in #1935

Full Changelog: v0.1.0-alpha.256...v0.1.0-alpha.258