Feature request: Scale down to [0-1] range

There is a need to normalize individual categories (0-1 scale) to hide real values. Useful for publications where the real values are sensitive.

The issue names no files, tests, or entry points. First clarify how category normalization should work and where the visual-analytics flow handles category values; done should include a defined 0–1 transformation that hides the original values and verifies the expected publication use case.

Written by the indexing model from the issue text.