Enable profile feature data filtering capabilities

This issue focuses on enabling others to filter specific features and their data when converting to different formats.

No files, tests, or entry points are identified in the issue. Start by locating the profile feature data handling and format-conversion paths, then clarify which features and data must be filterable for each supported output format. Done means the requested filtering behavior is defined and works consistently across those conversions.

Written by the indexing model from the issue text.