JonMidhir
Option to limit the number of crumbs.
It would be great to set an option to limit the number of crumbs. So for example we can set a total of X crumbs and it will overwrite the oldest ones when it reach the total. This would be when you have limitations on your Redis space.
The thing is that you can do this with your Redis setup by enabling the allkeys-lru eviction policy.
You can also set a mortality period in the Redcrumbs config and activity will be automatically expired.
You'd need to keep an eye on the lifetime of the least-used-key (how long an activity lives when it is created once and never used again) as your application grows.
Anyone who needs more finely grained control could subclass the Redcrumbs::Crumb class and introduce the behaviour they need so I'm reluctant to introduce too much complexity to the gem.
