fix(release): omit optional dependencies from the packed install

The Landlock platform packages sit behind optionalDependencies, and npm fails
the install on their 404 rather than skipping them: they belong to the native
sequence, whose pack needs a musl toolchain and one build per architecture, so
this job cannot produce them and holds no credentials to fetch them. A consumer
that cannot install them must still start, which is what optional means here.

The release spec also gains block bodies where the lint rule rejects returning a
void expression from an arrow shorthand.

.agents/notes/implemented/process/2026-08-10-npm-release-sequences.zh.md

@@ -101,6 +101,8 @@ dsh 族套用仓库的发布 payload 策略（拒绝源码与声明映射）。v
 
 dsh 的验证会一并安装 vendored 族的 pack 产物。harness 的包把 vendored 框架声明成 peer，而那些包属于另一条序列，无凭据的 job 无法从私有 registry 取到——所以 `release.yml` 为验证而打包 vendored 族，发布的仍只有自己那一份。
 
+验证会略去可选依赖。它们背后的 Landlock 平台包属于 native 序列，那条序列的 pack 需要 musl 工具链且每个架构各构建一次，单台 runner 产不出来；而装不到它们的消费方也必须能起——这正是「可选」在这里的含义。
+
 ### 本次带出的仓库改动
 
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