generateMeta abstract method
Generate entity metadata from a private signing key.
Creates cryptographically valid Meta by deriving the public key from the private signing key, with optional seed for reproducibility.
type is the metadata type (e.g., "user", "group").
sKey is the private signing key to derive the public key from.
seed is the optional seed value for generating the fingerprint.
Returns a new Meta instance with a verified fingerprint.
Implementation
Meta generateMeta(String type, SignKey sKey, {String? seed});