The Vault Creation Flow ASCII showed only manifest.enc as init's
encrypted artifact; cmd_init has been writing settings.enc in parallel
since the VaultSettings rollout. Update the encrypt step to show both
artifacts side-by-side with independent nonces.
Below the ASCII, add a short pointer noting that the per-item lifecycle
(typed-item envelope, attachment encryption, field-history) lives in
crates/relicario-core/ARCHITECTURE.md and reuses the same master_key +
XChaCha20-Poly1305 primitives. The doc-audit framing is "this top-level
doc could just point at the per-crate docs" — taking that trim path.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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