finance-solution 0.4.1

Finance math: TVM, cashflow, amortization, equity path metrics, technical analysis (SMA/EMA/WMA/HMA/MACD/BB/Keltner/Donchian/Stoch/VWAP/RVOL/RSI/ATR/LinReg), and options (BSM, Black76, GK, CRR American) with Result-only APIs, solutions, tables, and incremental state.
Documentation 
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//! Shared utilities: errors, validation helpers, domain newtypes, root-finding.
pub mod error;
pub mod primitives;
pub mod root_find;

#[doc(inline)]
pub use error::{FinanceError, FinanceResult};
#[doc(inline)]
pub use primitives::{Money, PeriodLength, Periods, PositivePrice, Rate};
#[doc(inline)]
pub use root_find::brent_root;