nx_bench_stress_emit_test.nx

nx_bench_stress_emit_test.nx -- runs the stress workload AND emits the substrate-honest TSV row to stdout so operators see numbers. This is the FIRST end-to-end "hard real" bench in the substrate: 1. Build real synthetic GGUF + BPE fixture 2. Build session + spawn LLM actor + listener 3. Drive 10 autoregressive iterations of REAL transformer forward 4. Capture wall-clock + substrate counters 5. Emit TSV header + data row to fd=1 (stdout) Output appears in the smoke driver's log so the human can READ the actual numbers, not just see "PASS". HONEST SCOPE: wall-clock is qemu-emulated -- meaningful for substrate-internal comparison + as the call-pattern that physical- hardware bench rigs will use unchanged.