[NOTICKET] fix: F-5 — isolate DB threads; stop treating session hardening as best-effort

[NOTICKET] fix: review cheap batch — F-19 SSE order, F-22/F-24 analysis_id, F-26, F-16, F-4

[NOTICKET] feat: bound catalog render + blob read; scope charts/traceability; mark degraded seams

[NOTICKET] fix: compiler parity — F-17 fabricated column, F-18 LIKE nulls, F-25 empty in/not_in

/fix change model to gpt 5.4 mini (#17)

fix/ check and new chart tool (#16)

/fix planner and report (#13)

/feat traceability (#11)

/fix validator and report (#10)

/fix analysis + report_inputs and storage update (#9)

/fix check and help tool (#8)

feat/Knowledge & Data Tools (#3)

feat/Planner Agent (#2)

feat/Catalog Retrieval System (#1)

[KM-438][KM-439] Improve Retrieval and Querying feature (#15)

Make a query for tabular (XLSX and CSV) (#14)

Merge dev_new to main (improve retriever and add querying) (#13)