Add rate limiting for import

**Description**
Currently config lacks proper monitoring support.

**Proposed solution**
Add configurable monitoring with sensible defaults.

**Priority**: Low/Medium

No files, tests, or entry points are named. Start by locating the import implementation and existing configuration or monitoring hooks, then clarify whether the requested change is rate limiting, monitoring, or both. Done should include a defined configuration interface, sensible defaults, and verifiable monitoring behavior.

Written by the indexing model from the issue text.