nx_ecdsa_p384_bisect_test.nx

nx_ecdsa_p384_bisect_test.nx -- bisect the verify failure on RFC 6979 §A.2.6. Compares each substrate intermediate to the Python golden bytes. Exit code identifies the first divergent step. Step verdicts (returned as exit code): 0 -- all steps match (verify would pass) 1 -- s_inv diverges (p384_modn_inv broken at this scale) 2 -- u1 diverges (p384_modn_mul broken or e_n wrong) 3 -- u2 diverges (same primitives, different input) 4 -- u1G.x diverges (scalar_mul or point_add broken) 5 -- u2Q.x diverges (same scalar_mul, non-G base) expect_exit: 0 license_tier: ORIGINAL