- Replaced direct embedding calls with a utility function across various components to streamline embedding logic.
- Added enable_summary flag to several models and routes to control summary generation behavior.
cast(document_metadata["key"], String) generates CAST(col->'key' AS TEXT)
which preserves JSON string quotes (e.g. '"Fix login bug"'), causing
case-insensitive comparisons to never match.
Replace with .astext which generates the ->> operator (unquoted text
extraction), making issue lookups by title and identifier work correctly.
