docs(11-01): complete stealth fingerprint masking plan

- Created 11-01-SUMMARY.md with execution results
- Updated STATE.md: Plan 1/2 complete, 50% progress
- Updated ROADMAP.md: 11-01 marked complete
- Updated REQUIREMENTS.md: STEALTH-01 to STEALTH-04 complete

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -116,7 +116,7 @@ Plans:
 **Plans**: 2 plans
 
 Plans:
-- [ ] 11-01-PLAN.md — 创建 StealthConfig 模块和单元测试
+- [x] 11-01-PLAN.md — 创建 StealthConfig 模块和单元测试
 - [ ] 11-02-PLAN.md — 集成 stealth 到 ZhihuCrawler 并验证
 
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@@ -138,7 +138,7 @@ Phases execute in numeric order: 1 → 2 → ... → 10 → 11
 | 8. 内容爬取实现 | v1.2 | 3/3 | Complete | 2026-03-17 |
 | 9. Pipeline 整合 | v1.2 | 1/1 | Complete | 2026-03-17 |
 | 10. Proxy Pool | v1.3 | 2/2 | Complete | 2026-03-18 |
-| 11. Stealth Fingerprinting | v1.4 | 0/2 | Ready to execute | - |
+| 11. Stealth Fingerprinting | v1.4 | 1/2 | In progress | - |
 
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