1. Use time.Time for expiration to simplify expiration checks.
2. Added a stopChan and a Stop method to properly stop the invalidateTask goroutine instead of directly changing values
3. Used Ticker in invalidateTask for periodic expiration checks
4. Leak Prevention: The invalidateTask() loop checks the TTL value before continuing. If the TTL is zero, the goroutine exits gracefully, preventing a memory leak.
Signed-off-by: sulemaanhamza <sulemanhamza97@gmail.com>
