Update hooks documentation

**Description**
Currently data lacks proper notifications support.

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

**Priority**: Low/Medium

The issue does not name a documentation file, implementation entry point, or test. First locate the hooks documentation and existing notification or hook handling, then clarify the required notification behavior and defaults; done means the documented and implemented configuration is covered by appropriate validation.

Written by the indexing model from the issue text.