docs: publish governance, governed boosts, receipts, OIDC phase 2, files SSO
Engineering guide: session/refresh/logout architecture, publish-governance
and amplify gating sections, file map to migrations 001-034. Admin guide:
governance administration, files-SSO operations, verification harnesses,
migration list + deploy order + 034 session note. User manual: calendar
receipt badges, boost gating, connections governance note (replaces the
stale 'stub' statuses). Design doc 2026-10-13: marked implemented with the
as-shipped phase 2. Wiki (EN/ES): Drive sign-in + boosts/approvals.
README: governance + Files SSO bullets.