docs: reflect review fixes (archive default, helper error semantics, TLS warning)
docs(groups): correct routing direction semantics IN/OUT are from the group's point of view: a sender needs the channel active as IN (send into), a receiver as OUT (receive its traffic). Verified against the feed producer/consumer entitlement patterns.
docs: convert blockquote notes/warnings to GitHub alert syntax > **Note:** / > **Warning:** etc. replaced by [!NOTE]/[!WARNING]/ > [!CAUTION] alerts across all API pages; style guide updated to > document the pattern.
docs(groups): Group API - channel subscriptions, scopes, quirks Documents the complete GroupApi wrapper: raw endpoints plus the read-modify-write helpers, the entitlements/channels/subscriptions scope model, and the live-verified server quirks (absolute semantics, empty-write no-op, self-query connection binding, LDAP-first auth without file fallback, stale padded group entries, fresh-user propagation delay).