nx_racing.nx

nx_racing.nx -- the RACING role = COMPETE (operator: don't miss the novel roles; this was the one missing capability). Racing RUNS the head-to-head 'tracks' -- our solution vs a competitor (gcc/clang/ the field) on the same task -- and COLLECTS both results. It does NOT judge: that is the REFEREE's verb (JUDGE). Folding Racing into Referee was the v1 roster error -- COMPETE and JUDGE are distinct. Racing's job: set up a FAIR track (same input + same oracle for both), run both competitors, record the two results, and hand them to the Referee. RACI: Racing produces RESULTS; Referee renders the VERDICT; Examiner self-grades; Critic counters; Auditor audits -- five distinct evaluation verbs. LAWS: struct-free, integer-only. Composes nx_role_audit (ra_distinct). license_tier: ORIGINAL