docs(book): Complete Part I with chapters 4-10 (foundational bridge)

Add 7 comprehensive chapters bridging language fundamentals to trading strategies,
completing the foundational section of the textbook.

Chapters 4-7 (Data Structures & Algorithms):
- Ch 4: Data Structures for Financial Computing (7,200 words)
  * Time series representations, order books, market data formats
  * Memory-efficient storage with delta/dictionary compression
  * Cache optimization and columnar layouts
  * Complete OVSM tick storage and multi-symbol manager

- Ch 5: Functional Programming for Trading Systems (8,200 words)
  * Pure functions for deterministic backtesting
  * Higher-order functions and indicator composition
  * Monads for error handling (Maybe, Either, IO)
  * Immutability for concurrent execution safety
  * Complete multi-timeframe and portfolio examples

- Ch 6: Stochastic Processes and Simulation (8,100 words)
  * Brownian motion and geometric BM with Cholesky
  * Jump-diffusion (Merton, Kou), GARCH models
  * Ornstein-Uhlenbeck for mean reversion
  * Monte Carlo with variance reduction techniques
  * Complete Heston model with risk metrics

- Ch 7: Optimization Algorithms (9,000 words)
  * Gradient descent variants (momentum, Adam)
  * Convex optimization for portfolio construction
  * Genetic algorithms and simulated annealing
  * Bayesian optimization with Gaussian processes
  * Walk-forward optimization framework

Chapters 8-10 (Validation & Production):
- Ch 8: Time Series Analysis (4,789 words)
  * Stationarity testing (ADF, KPSS)
  * ARIMA/SARIMA models with Box-Jenkins
  * Cointegration (Engle-Granger, Johansen)
  * Kalman filters for dynamic hedge ratios
  * Spectral analysis and cycle detection

- Ch 9: Backtesting Frameworks (3,619 words)
  * Event-driven vs vectorized architectures
  * Walk-forward and CSCV validation
  * Performance attribution and factor analysis
  * Pitfall detection (look-ahead, survivorship bias)
  * Complete backtest engine with Monte Carlo

- Ch 10: Production Trading Systems (4,036 words)
  * Microservices and event sourcing architecture
  * Order management with smart routing
  * Risk management and kill switches
  * Monitoring, alerting, and circuit breakers
  * Disaster recovery and regulatory compliance

All chapters include:
- Rich markdown with callout boxes (💡📊⚠️💻🎯🔬🛡️)
- Mermaid diagrams (20+ total across chapters)
- Comparison tables (40+ total)
- Production-ready OVSM implementations
- Academic citations (34 references)

Part I foundation now complete (10 chapters, ~78,000 words)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: 0xrinegade