- Text chunking: max 8000 chars per document, large CSV rows split with context header
- Text truncation: _embed_text truncates at 8000 chars before sending to model (prevents 400 errors)
- Purge before re-embed: deletes old docs by tenancy+date before inserting new ones
- Shared embedding status: file-based status (/data/.embed_status/) instead of in-memory dict (fixes multi-worker visibility)
- Progress bar: shows green (OK) + red (failures) segments, percentage, processed/total count
- Better error logging: extracts readable error message from OCI API errors