feat(documents): infer column types when generating Parquet from CSV/XLSX

feat(storage): add Supabase object storage and reduce exposed API surface

[KM-418]feat: align analysis flow contracts and scoped catalog rebuild

[NOTICKET] Use defer to guarantee I/O resource cleanup in service.go

[NOTICKET] Fix corrupt parquet: replace stub with real CSV/XLSX to Parquet conversion

[KM-590][DED][AI] Enhance data catalog: column stats, XLSX multi-sheet parquet, upload observability

[KM-578][DED][AI] Migrate Data Catalog functionality to go service

[NOTICKET] update column uuid to id in langchain_pg_embedding table

[KM-573] [DED][AI] Migration Endpoint Group Documents & Knowledge- Diagnose & mitigate slow upload on Windows loopback

[KM-467] [DED][AI] Go service full migration — add auth, rooms, documents, DB clients, catalog modules, DB init, and user seeder