Add DSV4 B200 disaggregated Dynamo SGLang STP configuration / 新增 DSV4 B200 分离式 Dynamo SGLang STP 配置

[RohitNagraj]

Summary

• Add a B200 multinode disaggregated Dynamo SGLang STP configuration for DSV4 at 8k/1k.
• Add ten checked-in srt-slurm recipes matching the configured prefill and decode topologies.
• Resolve the staged DSV4 checkpoint through the B200 launcher and use the checkpoint's native quantization metadata.

Validation

• Generated all configured sweep combinations successfully.
• Validated launcher shell syntax, YAML parsing, recipe/config consistency, and changelog ordering.
• Passed the matrix-logic test suite.

中文说明

• 新增 DSV4 在 B200 上的多节点分离式 Dynamo SGLang STP 8k/1k 配置。
• 新增十个已检入的 srt-slurm recipe，与配置中的预填充和解码拓扑一一对应。
• 通过 B200 启动器解析已暂存的 DSV4 检查点，并使用检查点原生的量化元数据。

验证

• 已成功生成全部配置扫描组合。
• 已验证启动器 Shell 语法、YAML 解析、recipe 与配置的一致性以及变更日志顺序。
• 已通过矩阵逻辑测试套件。

[github-actions]

Thanks for the contribution! Please reach out to respective companies' CODEOWNER to fill in the latest PR_REVIEW_CHECKLIST.md before pinging core maintainer on Slack for review. In order for the signoff PR check bot to trigger, you must follow the PR_REVIEW_CHECKLIST.md template correctly, including the phrase As a PR reviewer and CODEOWNER, I have reviewed this and have.

For PR verification, add the full-sweep-fail-fast label (strongly recommended) to this PR — the benchmark sweep only runs on labeled PRs. Use full-sweep-enabled only if you need matrix jobs to keep running past a failure.

PR authors are responsible for ensuring that after merging, all GitHub Action jobs fully pass. A lot of the time, failures are just flakes and simply re-running the failed jobs will fix it. See GitHub's docs on re-running failed jobs

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感谢你的贡献！请联系相应公司的 CODEOWNER 填写最新的 PR_REVIEW_CHECKLIST.md，然后再在 Slack 上联系核心维护者进行审阅。为了触发 signoff PR 检查机器人，你必须正确遵循 PR_REVIEW_CHECKLIST.md 模板，包括保留英文语句 As a PR reviewer and CODEOWNER, I have reviewed this and have。

如需进行 PR 验证，请为此 PR 添加 full-sweep-fail-fast 标签（强烈推荐）— 基准测试 sweep 仅在带有标签的 PR 上运行。仅当需要矩阵任务在失败后继续运行时才使用 full-sweep-enabled。

PR 作者有责任确保合并后所有 GitHub Action 任务完全通过。 很多时候失败只是偶发抖动（flake），重新运行失败的任务即可解决。参见 GitHub 关于重新运行失败任务的文档

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=29540112080
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=29540112080

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=29656832663
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=29656832663

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=29656873313
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=29656873313

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=29656873313
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=29656873313

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=30663020846
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=30663020846

[RohitNagraj]

Moved to #2560 .