docs(GOV-001): 建立工程治理与追溯规范

docs/index.md

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+# 项目文档索引
+
+## 必读规范
+
+- [代码开发规范](governance/code-development-standards.md)
+- [开发流程规范](governance/development-workflow.md)
+- [文档与追溯规范](governance/documentation-traceability.md)
+- [Git 与 Gitea 规范](governance/version-control-and-gitea.md)
+
+## 架构与决策
+
+- [系统架构](architecture/system-architecture.md)
+- [ADR-0001：单仓库双项目独立部署](adr/ADR-0001-monorepo-independent-deploy.md)
+- [ADR-0002：GitNexus 双门禁](adr/ADR-0002-gitnexus-double-gate.md)
+
+## GitNexus
+
+- [仓库基线](gitnexus/repository-baseline.md)
+- [当前架构摘要](gitnexus/architecture-summary.md)
+- [图谱历史](gitnexus/history/v0.0.0-governance.md)
+
+## 功能档案
+
+- [GOV-001：工程治理基线](features/GOV-001-engineering-governance/manifest.yaml)
+- [FEAT-MO-001：市场综合概览](features/FEAT-MO-001-market-overview/manifest.yaml)
+
+功能档案是需求、设计、代码、测试、版本和回退之间的唯一正式关联入口。