feat: 网关上传转对象存储（FS 适配器、8MB 上限、防路径穿越）

src/app/app.ts

@@ -2,11 +2,14 @@ import { Hono } from 'hono';
 import { healthRoute, registerHealthCheck } from './health';
 import { checkNats } from '../shared/bus/nats';
 import { proxyRoutes } from '../modules/proxy/routes';
+import { uploadRoutes } from '../modules/upload/routes';
 
 export function buildApp(): Hono {
   registerHealthCheck('nats', checkNats);
   const app = new Hono();
   app.route('/health', healthRoute()); // 公开：不过 requireAuth
+  // 顺序要紧：/api/upload 必须先于 /api 代理挂载，否则被代理的 catch-all 吞掉
+  app.route('/api/upload', uploadRoutes());
   app.route('/api', proxyRoutes());
   return app;
 }