/**
 * Lightweight phase timing for factory boot and hot request paths.
 *
 * Deliberately not a metrics framework: structured stderr lines that can be
 * grepped (`[factory:timing]`) and diffed across runs to localize slow boot
 * phases and slow per-request dependencies.
 */
/** Run `fn`, always logging its duration under `phase`. Boot-phase use. */
export declare function timedPhase<T>(phase: string, fn: () => Promise<T>): Promise<T>;
/**
 * Run `fn`, logging only when it exceeds `thresholdMs`. Request-path use,
 * where per-request logging would be noise but slow outliers must surface.
 */
export declare function timedAboveThreshold<T>(phase: string, thresholdMs: number, fn: () => Promise<T>): Promise<T>;
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