Add committment to value chain analysis

Update src/query_engine.py

Update src/query_engine.py

Update src/query_engine.py

Update src/query_engine.py

Update src/query_engine.py

fix: pre-release audit round 12 — 33 bugs fixed across all tiers

fix: Round 8 audit — 15 bugs fixed across 10 files (1 CRITICAL, 7 HIGH, 3 MEDIUM, 4 LOW)

fix: 10 bugs (4 HIGH + 6 MEDIUM) from comprehensive codebase audit

fix: 6-agent debug audit — 8 bugs fixed across codebase

fix: harden route parsing, column dedup, and column name access

feat: add KB meta overview for meta-question answering and LLM awareness

feat: add SQL schema loading and route/sql_query parsing to query engine

fix: harden codebase against format injection, empty responses, and unsafe config access

feat: add query understanding layer for better retrieval