v0.30.9

1. Elo Tournament Relegation Indexing: Fixed array slicing in ActiveGenie::Ranker::Entities::Players (calc_higher_tier / calc_lower_tier) to target and eliminate the actual worst-performing players.
2. Player Circular Reference: Fixed Player initialization to avoid circular references and JSON serialization crashes (JSON::NestingError) when passed hashes with string keys.
3. Lister Juries Schema Mismatch: Fixed required field name mismatch (why_these_juries vs reasoning) in the JSON schema and added robust coercion for stringified arrays.

What's Changed

• Ref/docs word by @Roriz in #69
• Feat/standard response by @Roriz in #70

Full Changelog: v0.30.4...v0.30.9