feat: cache expiration

[crookse]

Summary

What:

Make caching configurable and introduce a cache expiration. For example, search results that are cached and not used for 30 minutes should be removed from the cache. Any search results that are used should have its cache timer reset to 0.

Why:

Keep the cache clean and from growing unnecessarily.

Acceptance Criteria

Below is a list of tasks that must be completed before this issue can be closed.

• Write documentation
• Write unit tests
• Write integration tests