v0.8.0

• Added records(tags:, sources:) lookup method to filter records by tag
  and/or source without vector search
  • Implemented Common#records fallback using tag-intersection and
    source-membership filters
  • Implemented SQLiteCache#records override using json_each for precise
    array-element tag matching and source IN for multi-source filtering,
    skipping the embedding JOIN
• Upgraded Valkey image from 9.0.1-alpine to 9.1.2-alpine in
  docker-compose.yml