hanzoai/s3 (SeaweedFS fork w/ consensus+ZAP) is the canonical object
store; the minio pip package and its branding are gone. hanzo-s3 is now
a thin native boto3 adapter exposing a stable surface (S3Client + Bucket/
Object/Stat) so the hanzo s3 CLI and s3 MCP tool are unchanged. Removed
the dead MinioAdmin re-export (no consumer) and all MinIO naming.
CLI (7) + MCP S3Tool (14) tests green; ruff clean.