Improve validation performance

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

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

**Priority**: Low/Medium

The issue names no files, tests, or entry points. Start by locating the validation path and where data operations are retried or fail, then clarify the retry configuration and defaults with the maintainers. Done means the validation flow has configurable retry behavior with agreed sensible defaults and coverage for the retry cases.

Written by the indexing model from the issue text.