feat(ci): reusable workflows 加 Harden-Runner egress audit + scorecard

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内容

1. hygiene / check / dep-review / release 四个 reusable job 首步加 Harden-Runner（egress-policy: audit：只记录出网、不拦截、零风险）
2. 新增本仓 scorecard 周扫（周一 05:30 UTC）
3. 全部 pin SHA（harden-runner v2.21.0 = 05e31511），过 zizmor

决策依据：ADR-0011（https://github.com/Cloudbird-Software/agent-registry/pull/6）

切 block 时的起点 allowlist（audit 约 2 周后按日志收敛）

• hygiene: github.com, api.github.com, objects.githubusercontent.com（gitleaks 下载）, astral.sh（uv）, pypi.org, files.pythonhosted.org（uvx zizmor）
• check(node): 上述 + registry.npmjs.org, nodejs.org
• dep-review: api.github.com
• release: api.github.com, uploads.github.com, objects.githubusercontent.com, registry.npmjs.org, fulcio.sigstore.dev, rekor.sigstore.dev, tuf-repo-cdn.sigstore.dev（attestation）

生效说明

本仓 ci.yml 是内联副本，PR 自身检查不执行新 step；合并 + bump v1 标签后由调用方（template-service 等）实际生效。

依赖顺序

依赖 .github 的 allowlist PR 先合并并 apply——否则 bump v1 后调用方 CI 会因 action 未放行而失败。

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📥 Commits

Reviewing files that changed from the base of the PR and between 17ca80e and 42b3321.

📒 Files selected for processing (5)

• .github/workflows/check.yml
• .github/workflows/dep-review.yml
• .github/workflows/hygiene.yml
• .github/workflows/release.yml
• .github/workflows/scorecard.yml

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