feat: 初始化 SCALE OS 工程框架

- 添加 SCALE Engine 配置 (.scale/)
- 添加 OpenClaw Agent 配置 (.openclaw/)
- 添加知识文档 (AGENTS.md, TOOLS.md)
- 添加质量契约和工作流配置
- 添加 22 个工作流模板
- 添加验证脚本和门控脚本
- 添加 skills-registry 技能注册表

docs/workflow/templates/architecture-review.md

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+# Architecture Review
+
+## Scope
+
+- Modules touched:
+- Public contracts touched:
+- Data flow touched:
+
+## Boundary Checks
+
+- [ ] API/controller layer does not bypass service/usecase layer
+- [ ] Domain layer is not coupled to infrastructure details
+- [ ] Repository/ORM usage follows project conventions
+- [ ] Shared framework components are reused instead of duplicated
+- [ ] New abstractions remove real complexity
+
+## Risks
+
+- TBD
+
+## Decision
+
+- Approved/changes required: