[Defect]: FFDH pattern treats ephemeral E as required #1147

Describe the defect

schema/cryptography-defs.json currently has:

"pattern": "FFDH(E)[-{namedGroup}]"

Under the naming-pattern grammar (parentheses group; they are not optional), E is required, so constructed names can only be FFDHE / FFDHE-{namedGroup}. FFDH without E does not match.

ECDH already uses optional E: ECDH[E][-{ellipticCurve}]. FFDH should match that: E is ephemeral and optional

Expected

"pattern": "FFDH[E][-{namedGroup}]"

so FFDH, FFDHE, and FFDHE-ffdhe2048 are all valid.