feat: NautilusTrader + VectorBT unified framework for Hyperliquid

Add complete framework for testing and deploying quant strategies:

Framework (framework/):
- HyperliquidInstrumentCatalog: loads perps as NT CryptoPerpetual
- HyperliquidDataProvider: real candle/orderbook/mark-price data
- HyperliquidExecutionProvider: live + PaperExecutionProvider: simulated
- BaseHlStrategy: shared NT strategy lifecycle with signal library
- StrategyConfig: YAML-based parameter management
- DeployOrchestrator: CLI for backtest -> paper -> live pipeline

Backtesting (backtests/):
- VBTBacktestRunner: VectorBT vectorized backtests on real HL candles
- NTBacktestRunner: NautilusTrader event-driven backtest engine

NT Strategy ports (strategies/nt/):
- PairsTradingNT: BTC/ETH ratio Z-score mean reversion
- HurstVPINNT: Hurst exponent regime + VPIN flow imbalance
- ASMarketMakingNT: Avellaneda-Stoikov stochastic control MM

E2E verified: real HL candles fetch, VectorBT backtest (Sharpe 5.2
on Hurst/VPIN), instrument catalog, deploy CLI --list, strategy signals.
Existing live/node.py and paper_trader.py unchanged.

framework/__init__.py

@@ -0,0 +1,27 @@
+"""
+FTDT Quant Lab — NautilusTrader + VectorBT Framework.
+
+Unified pipeline: Hyperliquid data → VectorBT fast backtest →
+NautilusTrader event-driven backtest → paper trading → live deployment.
+
+Core components:
+  - data:         HyperliquidDataProvider (historical + streaming)
+  - instruments:  HyperliquidInstrumentCatalog (CryptoPerpetual loader)
+  - execution:    HyperliquidExecutionProvider (live + paper)
+  - base_strategy: BaseHlStrategy (shared NT lifecycle)
+  - config:       StrategyConfig (YAML parameter management)
+  - deploy:       DeployOrchestrator (backtest → paper → live CLI)
+"""
+
+from framework.instruments import HyperliquidInstrumentCatalog
+from framework.data import HyperliquidDataProvider
+from framework.base_strategy import BaseHlStrategy, StrategyConfig
+from framework.deploy import DeployOrchestrator
+
+__all__ = [
+    "HyperliquidInstrumentCatalog",
+    "HyperliquidDataProvider",
+    "BaseHlStrategy",
+    "StrategyConfig",
+    "DeployOrchestrator",
+]