Seal items AES-256-GCM under a random store key (item id as AAD).
Machine wrap: HKDF over a deterministic machined signature (domain
secrets-store-key, socket /run/souveraine/machined.sock; legacy
seed-id fallback, same framing) — private key never enters the daemon.
Argon2id passphrase wrap slot (64MiB/3, HKDF-mixed with the machine
signature) managed via org.souveraine.Secrets.Manage: SetPassphrase /
VerifyPassphrase / HasPassphrase; rotation re-wraps only.
Client-found spec fixes: DH prime was the 2048-bit group-14 constant,
not the 1024-bit Second Oakley group libsecret uses (pinned by test);
item ids now simple UUIDs (hyphens illegal in object paths); collection
also served at /aliases/default; interfaces registered before name
claim. Added spec signals, real timestamps, content types, atomic 0600
store writes.
packaging: systemd user unit, D-Bus activation shadow, idempotent
phone deploy script (masks gnome-keyring, verifies round-trip).
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