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

vitest.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['test/**/*.test.ts'],
+    setupFiles: ['test/support/setup.ts'],
+    testTimeout: 30_000,
+    hookTimeout: 30_000,
+  },
+});