v0.3.0 - Pricing & Risk Engine
- Black-Scholes options pricer (calls + puts)
- Greeks engine (Delta, Gamma, Vega, Theta, Rho)
- Implied volatility via Newton-Raphson
- VaR + CVaR (historical, parametric, Monte Carlo)
- Mean-variance portfolio optimiser + efficient frontier
- 30+ unit tests, put-call parity verified