Add configuration options for compression

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

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

**Priority**: Low/Medium

The title requests compression options, while the description requests configurable notifications, so first clarify which behavior is intended. No files, tests, or entry points are named; locate the configuration and notification entry points, then confirm the required defaults and a testable completion condition before making changes.

Written by the indexing model from the issue text.