Plan §15.4 Live Evolution Observatory requires data/evolution/meta.json
and data/evolution/lineage.json files, which the web platform expects
but the index-builder was not generating.
- Add EvolutionMeta type (generation, promoted_today, top_10_count, updated_at)
- Add LineageNode type (full program lineage with parent relationships)
- Add fetchEvolutionMeta() to query evolver database for stats
- Add fetchLineage() to query evolver programs table for lineage tree
- Add generateEvolutionMeta() to write data/evolution/meta.json
- Add generateLineage() to write data/evolution/lineage.json
- Wire generation into generateAllIndexes()
- Add files to R2 upload list
The implementation gracefully handles missing evolver database by
returning empty/placeholder data, allowing the index-builder to run
without evolution data while still producing valid JSON files.
Closes: bf-6cp0
b31ebee32f