### What problem does this PR solve?
Integration with Infinity
- Replaced ELASTICSEARCH with dataStoreConn
- Renamed deleteByQuery with delete
- Renamed bulk to upsertBulk
- getHighlight, getAggregation
- Fix KGSearch.search
- Moved Dealer.sql_retrieval to es_conn.py
### Type of change
- [x] Refactoring
### What problem does this PR solve?
fix: Use wrong variable in graph rag step.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: 陈晓强 <chenxiaoqiang@cvte.com>