id: CORE-001A
title: Decimal Unit Value Object Foundation
status: done
priority: P1
effort: M
depends_on:
  - CORE-001
summary: Introduced Decimal-backed unit-aware domain primitives.
references:
  - docs/CORE-001A_DECIMAL_UNITS_ARCHITECTURE.md
completed_notes:
  - Added Money, Weight, PricePerWeight, BaseCurrency, and WeightUnit.