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/db/scripts/migrate.ts

@@ -0,0 +1,23 @@
+// 用法:tsx scripts/migrate.ts latest|reset
+import { createDb, migrateToLatest, resetSchema } from "../src";
+
+const cmd = process.argv[2] ?? "latest";
+const db = createDb({ max: 1 });
+
+try {
+  if (cmd === "reset") {
+    if (process.env.NODE_ENV === "production") throw new Error("生产环境禁止 db:reset");
+    await resetSchema(db);
+    console.log("已清空 public schema");
+  } else if (cmd !== "latest") {
+    throw new Error(`未知命令: ${cmd}`);
+  }
+  const { results } = await migrateToLatest(db);
+  for (const r of results ?? []) console.log(`${r.status}\t${r.migrationName}`);
+  if (!results?.length) console.log("已是最新,无待执行迁移");
+} catch (err) {
+  console.error(err);
+  process.exitCode = 1;
+} finally {
+  await db.destroy();
+}