alex 56b68d7e57 docs: add backup tool design specification ...

- Architecture: Python FastAPI backend + React frontend
- Data model: 6 core tables (sources, jobs, schedules, executions, backups, settings)
- Backup flow: 7-step execution with incremental support
- Error handling: Retry logic, partial backup handling, retention policies
- Extensibility: Adapter pattern for sources and storage backends

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2026-05-11-backup-tool-design.md

docs: add backup tool design specification

2026-05-11 20:10:13 +02:00