feat(M02-A): 建立多小程序租户配置模型

backend/src/app.ts

@@ -4,9 +4,14 @@ import rateLimit from '@fastify/rate-limit';
 import Fastify, { type FastifyInstance } from 'fastify';
 import { loadConfig, type AppConfig } from './config.js';
 import { registerHealthRoutes } from './routes/health.js';
+import {
+  registerPlatformBootstrapRoutes,
+  type PlatformConfigResolver
+} from './routes/platform-bootstrap.js';
 
 export interface BuildAppOptions {
   config?: AppConfig;
+  platformConfigRepository?: PlatformConfigResolver;
 }
 
 declare module 'fastify' {
@@ -49,6 +54,9 @@ export async function buildApp(options: BuildAppOptions = {}): Promise<FastifyIn
   });
 
   await registerHealthRoutes(app, config);
+  if (options.platformConfigRepository) {
+    await registerPlatformBootstrapRoutes(app, options.platformConfigRepository);
+  }
 
   return app;
 }