import type { Request, Response, NextFunction } from 'express';
import type { LifecycleController } from '../services/lifecycle-controller';
/**
 * Lifecycle activity middleware - tracks request start/end.
 * Must be passive and non-blocking; missing controller is a no-op.
 * Bypasses /health to avoid impacting readiness probes.
 */
export declare function createLifecycleActivityMiddleware(controller: LifecycleController): (req: Request, res: Response, next: NextFunction) => void;
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