- Add experiments/dsv4_p800_long_context_matrix for 64k/128k/256k context
grid on DeepSeek-V4-Flash-INT8 with Kunlun P800.
- Change bench_client_docker.sh to use --concurrency instead of
--max-concurrency to match the user's long-context benchmark script.
- Add SGLANG_HEALTH_CHECK_TIMEOUT override to server_docker.sh for slow
long-context server startups.
- Tune dsv4_p800_256k_4k_probe with lower max-running-requests and
mem-fraction-static to avoid OOM on P800.