rank: separate MP and novel tracks

Classify reference materials into their own division

Keep reference materials in their own division instead of falling to other

Restore the constant the second masking pass depends on

Build the public row from an allowlist instead of removing fields from a copy

Remove every field that can reconstruct a private composition from the leaderboard response

Record the axes that were produced; rank only complete entries

Held entries are listed without a rank

Tidy a comment

Divisions by anion framework

Participation guide, prompt set, and per-model standings

Open Materials Challenge season 1 - solid-state electrolyte