chore: add changelog entry to validate agentic eval dispatch end-to-end

Eval-only, agentic-coding-scoped entry for dsv4-fp4-b300-vllm-agentic so
the PR sweep (and the on-push main sweep after merge) runs exactly one
job: the DEP8 top-concurrency SWE-bench eval through the new
sweep-agentic-evals dispatch, confirming the fix for the eval-only
failures first seen on #2258/#2259.

中文：新增 changelog 条目以端到端验证 agentic 评估调度——针对
dsv4-fp4-b300-vllm-agentic 的 evals-only、仅 agentic-coding 场景条目，使
PR 扫描（及合并后 main 分支的 push 触发扫描）只运行一个任务：DEP8 最高并发
的 SWE-bench 评估经由新的 sweep-agentic-evals 调度执行，确认对 #2258/#2259
上首次出现的 eval-only 失败的修复。

Author: Oseltamivir

perf-changelog.yaml

@@ -4933,3 +4933,12 @@
   description:
     - "Add MiniMax M3 NVFP4 B300 Dynamo-vLLM disaggregated EAGLE3 recipes"
   pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/2182
+
+- config-keys:
+    - dsv4-fp4-b300-vllm-agentic
+  description:
+    - "Validate the agentic SWE-bench eval dispatch path (agentic_evals bucket + sweep-agentic-evals job, fixing the eval-only failures first seen on #2258/#2259): re-run only the DEP8 top-concurrency SWE-bench eval; no throughput re-run."
+  pr-link: https://github.com/SemiAnalysisAI/InferenceX/pull/2267
+  evals-only: true
+  scenario-type:
+    - agentic-coding