Add rate limiting for encryption

**Problem**
When working with store, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

The issue names no files, tests, or entry points. First resolve whether the scope is encryption rate limiting or more descriptive errors for the store, then locate the relevant entry points and existing checks; done should mean the chosen behavior is implemented and verified by the project's checks.

Written by the indexing model from the issue text.