v1.9.02026-04-02

Migration content proofread and cleanup

Full proofread of all migration articles across EN/FR/DE. Remove redundant timeline category, scaffold SAML technical article, fix broken links and stub references.

Amélioration2

Proofread and consistency pass on all 7 migration articles (emails-whitelist, checklist, sandbox, SSO, domain, billing, process) across all 3 locales
Remove timeline category (after, go-live, schedule) — content already covered by migration/process and migration/checklist

Nouveauté1

Scaffold SAML technical article with structured TODO outline for engineering input

Correction2

Remove links to stub holacracy articles from migration section
Fix broken-links test: use npx instead of pnpm exec to avoid yarn conflict