Add rate limiting for notifications

**Description**
Currently helpers lacks proper pagination support.

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

**Priority**: Low/Medium

No file, test, or entry point is named. First locate the helpers and notification code, then resolve whether the intended change is rate limiting or configurable pagination; done means the selected behavior has sensible defaults and is configurable as described.

Written by the indexing model from the issue text.