Document the config-as-code strategy for business-tunable reference data:
typed checked-in config validated at compile time (never a production DB),
where UI text (), reference tables (Stamdata/), and letter content
each live, and why org-templates are the deliberate runtime-editable exception.
Index it in docs/README.md and add a CLAUDE.md pointer.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
