Update dsr1-fp4-b300-sglang SGLang image to v0.5.12-cu130

[Klaud-Cold]

Updates SGLang image for dsr1-fp4-b300-sglang from v0.5.11-cu130 to v0.5.12-cu130.
\nRef #1154

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[github-actions]

Thanks for the contribution! For vLLM & SGLang, please ensure that your recipes is similar to the official vLLM recipes and/or the SGLang cookbook

• https://docs.sglang.io/cookbook/intro
• https://recipes.vllm.ai/

If it is not, please create a PR first before we can merge your single node PR into the master branch. Let's ensure that the documentation is first class such that the entire ML community can benefit from your hard work! Thank you

• https://github.com/vllm-project/recipes
• https://github.com/sgl-project/sglang/tree/main/docs_new

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[claude]

Simple SGLang image version bump (v0.5.11-cu130 → v0.5.12-cu130) with matching changelog entry.

Extended reasoning...

Overview

This PR updates the SGLang image for the dsr1-fp4-b300-sglang config from lmsysorg/sglang:v0.5.11-cu130 to lmsysorg/sglang:v0.5.12-cu130 in .github/configs/nvidia-master.yaml, and adds a corresponding entry to perf-changelog.yaml.

Security risks

None. This is a container image version bump pointing at an upstream-published tag; no auth, crypto, or permission code is touched.

Level of scrutiny

Low. The change is mechanical, self-contained, follows the established pattern used for other image version bumps in this repo, and is restricted to YAML config files. The pr-link: XXX placeholder in the changelog matches an existing entry in the same file, so it is a known pattern (likely backfilled).

Other factors

The PR is labeled full-sweep-enabled, so performance verification will run automatically. No bugs were found by the bug hunting system.

[github-actions]

see unofficial run visualizer at https://inferencex.semianalysis.com/inference?unofficialRun=25980014268
see unofficial run visualizer at https://inferencex.semianalysis.com/evaluation?unofficialRun=25980014268

[functionstackx]

/reuse-sweep-run