- Company step gains a "Stock Valuation" select (FIFO default, Moving
Average option). Value is passed through build_setup_args and applied
to Company.valuation_method in materialize_after_setup — Company-level
wins over Stock Settings in get_valuation_method, so inventory posts
use the choice immediately.
- Cannot be changed after first stock entry (helper text + ERPNext
validation), so this is the only window to set it cleanly.
- CLAUDE.md added to document the architecture for future sessions
(override trick, two separate auth flows, cache doctype, rollback
mechanics).
