test(check-links): 反向验证探针 —— 故意把一条相对链接改指不存在路径 (#6028)

声明 B(咬合面)的红段:预期本次 push 让 Check Links 变红,且报错点名
content/docs/kernel/services-checklist.mdx:188 指向的
./services-probe-6028-does-not-exist.mdx。下一个 commit 会 git revert
本提交,预期转绿;最终该文件相对 origin/main 净零 diff。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BDmDsu2575gDxeMCxXhDE3

Author: claude

content/docs/kernel/services-checklist.mdx

@@ -185,7 +185,7 @@ no message. Below is the former — the fallback case:
 
 A service may self-declare that it is not the full thing (ADR-0076 D12), via a
 `__serviceInfo: { status, handlerReady?, message? }` property on the registered
-instance — see [Services → presence is not capability](./services.mdx) for how
+instance — see [Services → presence is not capability](./services-probe-6028-does-not-exist.mdx) for how
 an in-process caller reads it. The two values mean different things, and for the
 HTTP surface the difference is load-bearing (#4058):