- ARCHITECTURE.md: add Fuchs_Database (SSDT) and the MFR interface doc to the
project table; new MFR ERP Integration and Database sections.
- copilot-instructions.md + CLAUDE.md (kept in sync): add MFR ERP integration
and Database sections pointing to MFR_RESTClient/Docs/mfr_interface_description.md
as the contract to read before changing the client; CLAUDE.md doc map updated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>