v4: Bitcoin Accumulation Zone Monitor — on-chain metrics + backtest engine

COMPLETE PIVOT from ML trading optimizer to on-chain metrics monitor.

Architecture:
- Playwright scrapes LookIntoBitcoin Plotly Dash charts for real on-chain data
- 10 proven metrics: Puell Multiple, MVRV Z-Score, Fear & Greed, Reserve Risk,
  RHODL Ratio, NUPL, LTH Realized Price, 200W SMA, Hash Ribbons, Drawdown
- Each metric scores 0-10, composite 0-100
- No ML, no black box — every signal transparent and traceable
- Historical backtest validates scoring against actual BTC forward returns
- Recency-weighted analysis accounts for diminishing cycle returns

Full documentation in ARCHITECTURE.md

.gitignore

@@ -1,4 +1,9 @@
-scoring/__pycache__/
-scrapers/__pycache__/
 __pycache__/
-data/
+*.pyc
+data/cache.json
+data/history.json
+config/llm_settings.json
+results/
+*.log
+.env
+node_modules/