Verifies a leaf's account identity proof: the embedded account identity and
MLS signature key match the leaf, the ciphersuite/scheme match, and the
BIP-340 signature verifies under the credential's x-only Nostr pubkey.
Throws on any mismatch. Mirrors darkmatter
validate_leaf_account_identity_proof.
Verifies a leaf's account identity proof: the embedded account identity and MLS signature key match the leaf, the ciphersuite/scheme match, and the BIP-340 signature verifies under the credential's x-only Nostr pubkey.
Throws on any mismatch. Mirrors darkmatter
validate_leaf_account_identity_proof.