Timer FD Periodic Scheduler - Quant Developer Interview Question

Problem Description

Low-latency trading systems rely on precise task scheduling to maintain connection health and transmit heartbeats without blocking critical execution threads. Utilizing Linux system calls like timerfd combined with epoll enables asynchronous handling of periodic events alongside network sockets, minimizing jitter and ensuring high responsiveness in event-driven gateways. Task Implement the PeriodicScheduler class to manage periodic events using Linux system calls. The run method must create a m