need expire time

is possible have a something for set expire time of data ?

it's good if possible when i add a item in box, set a expire time to delete it automatically when expired time reached or when called `box.compact()`

currently we must iterate in all items in box to found expired items

No files or tests are named. Start by reviewing the box storage and compaction paths, then determine how expiration should be represented and triggered. Done means expired items are removed automatically when their expiry is reached or when box.compact() is called, without requiring callers to iterate over all items.

Written by the indexing model from the issue text.