Add rate limiting for monitoring

**Description**
Currently utils lacks proper serialization support.

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

**Priority**: Low/Medium

The title requests monitoring rate limiting, while the body requests configurable serialization in utils. First inspect the utils area and monitoring entry point, then clarify which scope is intended and how completion will be tested. Done should include an agreed behavior, sensible defaults, and focused verification for the selected change.

Written by the indexing model from the issue text.