/**
 * lumiarq.traze — built-in request observability middleware.
 *
 * This middleware captures request duration and status for all routes.
 * A runtime-provided logger can be injected during boot for structured output.
 */
type TrazeLogger = {
    info: (message: string, context?: Record<string, unknown>) => Promise<void>;
    error: (message: string, context?: Record<string, unknown>) => Promise<void>;
};
export declare function setTrazeLogger(logger: TrazeLogger | undefined): void;
export declare const trazeMiddleware: import("../types.js").MiddlewareDefinition;
export {};
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