import { NestMiddleware } from '@nestjs/common';
/**
 * HttpLoggingMiddleware
 *
 * This middleware logs incoming HTTP requests and their corresponding responses
 * for improved observability. It is primarily intended for non-internal routes,
 * so it avoids noisy or repetitive logging of system, health check, API, or
 * Swagger documentation endpoints.
 *
 * Logging includes:
 * - HTTP method
 * - Original request URL
 * - Response status code and status message
 *
 * Errors in the 4xx range are logged at the "warn" level, while all other logs
 * use the standard "log" level. This helps distinguish between client errors
 * and normal traffic or server issues.
 */
export declare const HttpLoggingMiddleware: NestMiddleware['use'];