Add Step 3.7 Flash runs (mythos-craft, pelican-cycling)

Step 3.7 Flash (StepFun) via Claude Code · High, one-shot. The mythos-craft
Write tool call failed during generation, so the model's output was saved into
the HTML by hand (code unmodified) — documented in the run note. Registry
tables regenerated; validation passes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -60,6 +60,7 @@ NAGI STUDIO 的 LLM 测评案例集：同一段提示词，不同「模型 × Ha
 | GLM-5 Turbo | Zhipu AI | ZCode · Thinking | 03 |
 | GLM-5.2 | Zhipu AI | ZCode · Max | 03 |
 | Qwen3.7-Max | Alibaba | Qoder · Default | 02 |
+| Step 3.7 Flash | StepFun | Claude Code · High | 02 |
 
 待测：GLM-5.1（欢迎 PR 补充）
 <!-- registry:end -->