docs(book): Add Chapter 16 Part 4 - PEPE2 Worked Example

Section 16.11: Complete PEPE2 memecoin momentum trade walkthrough
- Minute-by-minute timeline (10:14 AM - 2:45 PM UTC, 4.43h hold)
- Pre-trade context (PEPE hype cycle, K portfolio, 67% win rate)
- Discovery: Scanner detects at 15 min post-launch
- Safety: All 10 checks pass (88/100 score, SAFE classification)
- Signal: 0.929 composite score (STRONG BUY, top 5%)
- Entry: Kelly sizing ,780 → capped at ,000 (10% portfolio limit)
- Exit: Tiered 25%@2x, 25%@5x, 50%@6.43x (trailing stop)
- Result: +390% return (4.90x weighted average), 4.43h hold

Performance breakdown:
✅ Tier 1 (2x): ,521 proceeds, +25.4% profit locked (24 min hold)
✅ Tier 2 (5x): ,420 proceeds, +73.8% cumulative (1h 10m)
✅ Trailing stop (6.43x): ,084 proceeds (4h 27m total)
✅ Peak: 7.61x (,030), captured 65.8% of peak gain
✅ Avoided: -70% crash next day (price /usr/bin/zsh.0001204)

Comparison analysis:
- Production system: +390% (systematic + disciplined)
- FOMO buyer: -23% (entered late, no exit plan)
- Diamond hands: +244% (held through -70% crash, gave back 73% of peak)
- Weak hands: +100% (sold too early at 2x)

System validation:
- Safety checks prevented honeypot/rug risk
- Kelly sizing with 10% cap limited exposure
- Tiered exits locked profits before crash
- Trailing stop protected 85% of gains

New content: ~2,000 words
Chapter total: ~13,700 words (91% of 15K maximum target)

Author: 0xrinegade