chore: scaffold monorepo and migrate uhd_web design system (W0-A)

- pnpm workspace: apps/{web,server}, packages/{contracts,db,domain,adapters,tasks,agent,testkit}
- server: Hono + zod-openapi, API Key auth with scopes, redacting pino logger, SSE event bus with replay, worker heartbeat
- db: Kysely + pg, file migrator, 0001_init (settings/api_key/audit_event/outbox_event)
- web: React Router 7 SPA console shell with 12 workspace placeholders, uhd_web tokens/ui/guard scripts
- docs: ADR-001 (Node over Deno), dev runbook, design system rules

Co-Authored-By: Claude Fable 5.1 <[email protected]>

packages/domain/README.md

@@ -0,0 +1,3 @@
+# @umt/domain
+
+纯业务逻辑(无 IO):发布标题解析、身份匹配、Slot 满足度、路径绑定、整理计划与策略评估。禁止 import 任何网络/文件/数据库库,保证 100% 可单元测试。