Adds a MinIO-backed ingest flow: upload to s3://insurance-kb/inbox/<kind>/
via MinIO Console or any S3 client, then POST /admin/kb/scan-inbox to
process all pending files. Successful ingests move to processed/<kind>/,
failures move to failed/<kind>/ with the error stored as S3 metadata.
- api/services/kb/s3.py: boto3 client, list_inbox/fetch/move helpers.
- api/routes/admin_kb.py: GET /admin/kb/inbox, POST /admin/kb/scan-inbox.
- The kind is derived from the folder path; title/identifier default to
the filename stem and can be refined by re-ingesting with metadata.
Refs Task Master #2
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
chaim
5ddacbe573