The solana fork's Scalar52 sub/add/conditional_add_l extract token-identical
to upstream dalek (only the crate namespace differs: curve25519 vs
curve25519_dalek), so ScalarSubSpec/ScalarAddSpec port with the namespace
adjustment and verify against THIS fork's own gen (R2). ScalarLoop
infrastructure included. check-scalar.sh at dalek parity: full manifest +
5/5 kernel axiom audit, green at 300s/4096MB.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
