Add rate limiting for export

**Problem**
When working with services, 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. Start by locating the export handling and service error paths, then clarify the intended rate-limit behavior, detailed error cases, and acceptance criteria before making changes.

Written by the indexing model from the issue text.