[Feature Request]: mark database as read-only to allow parallel concurrent reads

[sam-bercovici]

Describe the problem

The documentation says that when using in memory instance, it will lock when trying to read data from the same index concurrently.
If I can "lock"/mark that database that its intended use is read only, is there a way to enable concurrent reading?

Describe the proposed solution

when opening a database, mark that its read-only.
This may allow to have concurrent ready.

This works well when the database files are "frozen" and will not be concurrently updated while reading from the database.

Alternatives considered

No response

Importance

nice to have

Additional Information

No response