Phase 110 complete:
- add Statistics -> Podsumowanie page
- add monthly order count and value charts per integration plus total
- use Chart.js with table fallback and 04-2026 default history start
- update PAUL and DOCS technical documentation
Phase 109 complete:
- Add checkbox dropdown enhancement for statistics multi-select filters
- Preserve GET contract for channels[] and status_groups[]
- Update PAUL plan context to read .paul/codebase docs
Co-Authored-By: Codex <noreply@openai.com>
