v0.2.3 - description cap conform + doctrine link

Fixed

• SKILL frontmatter description trimmed 1049 -> 985 chars (the 1024 cross-platform cap; the one-flock conform CoalBoard + CoalWash already did) - every auto-trigger word and both honesty clauses survive verbatim.
• README doctrine link now points at the .github repo where the doctrine docs live.
• The [0.2.2] CHANGELOG heading an in-progress edit had overwritten is restored.

Credit: agnix + the user's CoalBoard nasa audit. Gate: 19/19.