docs(10-01): complete proxy pool core plan

- SUMMARY.md: proxy pool infrastructure with round-robin rotation
- STATE.md: updated position to Plan 1 of 2
- ROADMAP.md: marked 10-01 complete
- REQUIREMENTS.md: marked PROXY-01, PROXY-02 complete

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

.planning/ROADMAP.md

@@ -129,11 +129,11 @@ Plans:
   2. 每次请求自动选择下一个可用代理，实现负载均衡
   3. 代理不可用时自动检测并标记为失效
   4. 当前代理失败时自动切换到备用代理继续请求
-**Plans**: TBD
+**Plans**: 2 plans
 
 Plans:
-- [ ] 10-01: 代理池核心实现 (PROXY-01, PROXY-02)
-- [ ] 10-02: 健康检查与故障切换 (PROXY-03, PROXY-04)
+- [x] 10-01: ProxyPool 核心类实现 — 从 YAML/环境变量加载代理，Round-Robin 轮换
+- [ ] 10-02: 健康检查与 ZhihuCrawler 集成 — 被动检测、冷却恢复、代理切换
 
 #### Phase 11: Behavior Camouflage (请求行为伪装)
 **Goal**: 通过随机化请求特征模拟真实用户行为，降低被反爬系统检测的风险
@@ -210,7 +210,7 @@ Phases execute in numeric order: 1 → ... → 9 → 10 → 11 → 12 → 13 →
 | 7. 登录认证体系 | v1.2 | 3/3 | Complete | 2026-03-17 |
 | 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 | 0/2 | Ready to plan | - |
+| 10. Proxy Pool | v1.3 | 1/2 | In progress | - |
 | 11. Behavior Camouflage | v1.3 | 0/3 | Not started | - |
 | 12. CAPTCHA Detection | v1.3 | 0/2 | Not started | - |
 | 13. Error Recovery | v1.3 | 0/2 | Not started | - |