feat: implement AdminGuard and QueryGuard for enhanced access control; refactor API and query handling; add deleteQuery method in QueryHandlerService; update QueryResponse type for improved response handling

src/api/api.controller.ts

@@ -1,7 +1,18 @@
-import { Body, Controller, Delete, Inject, Post } from "@nestjs/common";
+import {
+  Body,
+  Controller,
+  Delete,
+  Inject,
+  Post,
+  UseGuards,
+} from "@nestjs/common";
 import { ApiService } from "./api.service";
+import { AdminGuard } from "./guards/admin.guard";
+import { ApiTokenGuard } from "./guards/api-token.guard";
 
 @Controller("api")
+@UseGuards(ApiTokenGuard)
+@UseGuards(AdminGuard)
 export class ApiController {
   constructor(
     @Inject(ApiService)