fix(api): requireDatabaseUrl 早失败守卫；typecheck 门禁；build 排除 test；池生命周期注释

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/api/drizzle.config.ts

@@ -1,9 +1,13 @@
 import './src/db/env.js'
+import { requireDatabaseUrl } from './src/db/env.js'
 import { defineConfig } from 'drizzle-kit'
 
+// 故意不做 DATABASE_URL_TEST 回退：迁移永不指向临时测试库（Task 13 helper 用显式连接串迁移临时库）
+const url = requireDatabaseUrl({ allowTestUrl: false })
+
 export default defineConfig({
   dialect: 'postgresql',
   schema: './src/db/schema.ts',
   out: './drizzle',
-  dbCredentials: { url: process.env.DATABASE_URL! },
+  dbCredentials: { url },
 })