Python backup module (Azure AD OAuth2 → BC API v2.0 → GPG AES256 → S3),
Flask web UI on port 1890 with SSE live log streaming, dual incremental +
full backup schedules, chain restore merging full + incrementals, and
per-entity file browser with ZIP download.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
