403 if locked; 404 if
expired. Returns { key, value, expires_at }.Vault
Reveal Vault Entry
POST /v1/users/:user_id/vault/:key/reveal — decrypt + return value in body.
POST /v1/users/:user_id/vault/:key/reveal — decrypt + return value in body.
403 if locked; 404 if
expired. Returns { key, value, expires_at }.