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.

No files, tests, or entry points are named. First reconcile the title's analytics rate-limiting request with the body’s broader request for more descriptive handler errors, then locate the relevant handlers and analytics path. Done should mean an agreed scope, implemented behavior, and tests covering the resulting error messages and rate-limiting behavior.

Written by the indexing model from the issue text.