Two pairs shared the same `name` field, which breaks tool/agent
registries that key on display name (Claude Code, etc.):
- 威胁检测工程师: engineering vs security
- 招聘专家: hr vs specialized
Rename only the YAML `name` (body titles unchanged for readability):
| File | New name |
|---|---|
| engineering-threat-detection-engineer | 威胁检测工程师（工程侧） |
| security-threat-detection-engineer | 威胁检测工程师（安全运营） |
| hr-recruiter | 招聘专家（HR 全流程） |
| specialized/recruitment-specialist | 人才获取专家 |
Avoided 招聘运营专家 because support/support-recruitment-specialist.md
already uses that name.
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