v0.0.3

0.0.3 - 2026-04-26

Fixed

• Rational scalars and rates are now accepted everywhere they are documented to
  work: Amount#*, Amount#/, Amount#to(rate:), Amount.register_default_rate,
  and display_units[unit][:scale]. Previously each of these called
  BigDecimal(value.to_s), which raises ArgumentError for Rational#to_s
  ("3/2"). All five sites now go through a single internal helper,
  Amount.coerce_decimal, that handles BigDecimal, Rational, and string-or-
  numeric inputs uniformly.
• Amount.load wraps a missing :atomic or :symbol key as
  Amount::InvalidInput ("amount payload missing key: atomic") instead of
  leaking a raw KeyError. This matches the AR adapter's Type#cast_hash
  behavior so callers can rescue a single error class.