DVC needs credentials to be configured via 'dvc remote modify' command
rather than just environment variables. This fixes 403 Forbidden errors
when accessing MinIO/S3 storage.
Changes:
- Added dvc remote modify commands to set access_key_id and secret_access_key
- Applied to both pull and push operations in test and train jobs
- Added .dvc/config.local to .gitignore to prevent credential leaks
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
