Resolve final-review findings: commandRole is now the single source of
truth (Run resolves role once and threads it to handlers, replacing
hardcoded openStore roles). Tighten crypto/SKILL/SPEC/USER-MANUAL wording
and document init's agent-key-on-first-init-only semantics.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Open() now opens LOCKED; InitKeys generates a DEK sealed under both KEKs;
Unlock loads it from the role's slot (admin slot has no agent fallback).
s.key becomes the DEK, so account/mail crypto is unchanged.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>