Refactor code structure for improved readability and maintainability

src/query/handler/query.handler.controller.ts

@@ -0,0 +1,10 @@
+import { Controller, Inject } from "@nestjs/common";
+import { QueryHandlerService } from "./query.handler.service";
+
+@Controller("query")
+export class QueryHandlerController {
+  constructor(
+    @Inject(QueryHandlerService)
+    private readonly queryHandlerService: QueryHandlerService
+  ) {}
+}

src/query/handler/query.handler.service.ts

@@ -0,0 +1,4 @@
+import { Injectable } from "@nestjs/common";
+
+@Injectable()
+export class QueryHandlerService {}