Captures the design for replacing the current per-query, per-dialect
historic-SQL pipeline with a unified, LLM-driven ingest that feeds both
ktx wiki search (pattern pages) and ktx sl search (per-table usage in
_schema shards). Spec covers motivation, principles, architecture, hot
and cold paths, search-surface plumbing, schemas, configuration, cutover
plan, and rejected alternatives.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
