Improve Error Handling in CSRF Middleware Storage

[coderabbitai]

There is a need to enhance error handling in the CSRF middleware, specifically within the files middleware/csrf/session_manager.go and middleware/csrf/storage_manager.go. This issue was identified during a discussion in PR #3016. Improving this could involve refactoring the error handling logic to provide more robust and informative error responses.

For more context, see the discussion here: #3016 (comment)