chore: 服务骨架（Hono+TS+vitest+eslint，health 路由与探活注册点）

test/unit/health.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest';
+import { buildApp } from '../../src/app/app';
+
+describe('health', () => {
+  it('无探活项时返回 200 ok', async () => {
+    const res = await buildApp().request('/health');
+    expect(res.status).toBe(200);
+    const body = (await res.json()) as { ok: boolean; service: string };
+    expect(body.ok).toBe(true);
+    expect(body.service).toMatch(/^bpos-service-/);
+  });
+});