nx_actor_role_llm_v2_test.nx

nx_actor_role_llm_v2_test.nx -- wiring smoke for nx_actor_role_llm_v2. HONEST SCOPE: this smoke proves the adapter compiles, constructs, validates inputs, and exposes correct accessors / phase + verdict enums. It does NOT drive the v2 runner end-to-end because that requires a real GGUF fixture (the v2 runner has its own real-GGUF happy-path smoke at nx_llm_run_v2_test.nx). Driving the runner with null/empty inputs segfaults inside nx_bpe_encode -- so the adapter's constructor rejects all null pointers at the boundary per the defensive-at-boundaries discipline, and this smoke verifies those rejections. Future smoke would compose with a synthetic GGUF builder to exercise the RUN -> EMIT path end-to-end.