Until L2PS is natively CCI-keyed, each subnet member publishes one of
these so channel signatures can be tied back to the same identity used
in DACS-2. The signature MUST be produced by the key controlling
cciPrimaryClaim — on Demos, the Demos Ed25519 key (NOT the RSA subnet
key the L2PS class is configured with).
DACS-3 §8.3.2 interim membership binding.
Until L2PS is natively CCI-keyed, each subnet member publishes one of these so channel signatures can be tied back to the same identity used in DACS-2. The signature MUST be produced by the key controlling
cciPrimaryClaim— on Demos, the Demos Ed25519 key (NOT the RSA subnet key the L2PS class is configured with).