feat(M02-A): 建立多小程序租户配置模型

backend/src/server.ts

@@ -1,8 +1,17 @@
 import { buildApp } from './app.js';
 import { loadConfig } from './config.js';
+import { closeMySqlPool, createMySqlPool } from './db/mysql.js';
+import { PlatformConfigRepository } from './tenancy/platform-config-repository.js';
 
 const config = loadConfig();
-const app = await buildApp({ config });
+const pool = createMySqlPool(config);
+const app = await buildApp({
+  config,
+  platformConfigRepository: new PlatformConfigRepository(pool)
+});
+app.addHook('onClose', async () => {
+  await closeMySqlPool(pool);
+});
 
 try {
   await app.listen({ host: config.host, port: config.port });