feat: enhance API and query handling with Redis caching; add QueryGuard for query validation; refactor services to utilize RedisClient for improved performance

src/api/guards/query.guard.ts

@@ -0,0 +1,49 @@
+import {
+  CanActivate,
+  ExecutionContext,
+  Inject,
+  Injectable,
+  UnauthorizedException,
+} from "@nestjs/common";
+import { QueryHandlerService } from "src/query/handler/query.handler.service";
+
+@Injectable()
+export class QueryGuard implements CanActivate {
+  constructor(
+    @Inject(QueryHandlerService)
+    private readonly queryHandlerService: QueryHandlerService
+  ) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const request = context.switchToHttp().getRequest();
+    const apiToken = request.apiToken;
+
+    if (!apiToken || !apiToken.project) {
+      throw new UnauthorizedException("Project not found for the API token");
+    }
+
+    const queryId = request.params?.id;
+
+    if (!queryId) {
+      throw new UnauthorizedException("Query ID is required");
+    }
+
+    const query = await this.queryHandlerService.getQueryById(queryId);
+
+    if (!query) {
+      throw new UnauthorizedException("Query not found");
+    }
+
+    if (!query.isActive) {
+      throw new UnauthorizedException("Query is inactive");
+    }
+
+    if (query.project.id !== apiToken.project.id) {
+      throw new UnauthorizedException("You do not have access to this query");
+    }
+
+    request.query = query;
+
+    return true;
+  }
+}