refactor(server): make redis required module (#9121)

packages/backend/server/src/base/redis/config.ts

@@ -0,0 +1,11 @@
+import { RedisOptions } from 'ioredis';
+
+import { defineStartupConfig, ModuleConfig } from '../../base/config';
+
+declare module '../config' {
+  interface AppConfig {
+    redis: ModuleConfig<RedisOptions>;
+  }
+}
+
+defineStartupConfig('redis', {});