Add rate limiting for analytics

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

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

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

Start by locating the analytics handlers and reading their current error-handling paths. Compare the issue title with the body, then clarify the intended rate-limiting behavior and the detailed errors that should result. Done should include the agreed rate limit and descriptive handler errors, with tests if the project has coverage for these paths.

Written by the indexing model from the issue text.