DIP/PATCH_NOTES.md

Slice 1 generic search patch

Included changes:

• Generic search DTOs, planner, orchestrator, engine SPI
• PostgreSQL full-text engine and repository
• PostgreSQL trigram engine and repository
• Score normalization and result fusion
• Generic /search endpoint
• Lexical index maintenance service and startup backfill runner
• DOC lexical search migration (V14)
• Modified DOC representation write path to refresh search vectors

Important note:

• Full-text search requires V14__doc_search_slice1_support.sql to be applied.
• The lexical index service is guarded and will no-op if the search columns are not yet present.
• Because Flyway is currently disabled in application.yml, apply the migration manually or enable Flyway before using the new search endpoint.