Sec. Index: implement caching of indexes for collections

[islamaliev]

Is the request related to a problem?

At the moment there is no caching mechanism for indexes (descriptions) loaded from a storage. So every time an operation needs to be performed that involves indexes they are fetched. This might be very inefficient for collections with many indexes.

The feature you would like

We should implement some kind of caching that will keep the loaded indexes in memory.
It should be consistent across multiple instances of (possibly the same) collections and as such should be thread-safe.

Alternatives considered

No response

Additional context

No response