feat: add 5-day reversal strategy

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

run_example.py

@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
-"""End-to-end smoke test: download data -> backtest SMA crossover -> print results."""
+"""End-to-end smoke test: download data -> backtest 5-day reversal -> print results."""
 import logging
 from backtest.config import BacktestConfig
 from backtest.runner import BacktestRunner
-from strategies.base import SmaCross
+from strategies.reversal import FiveDayReversal
 from analysis.report import print_results
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")
@@ -11,14 +11,14 @@ logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(me
 
 def main():
     config = BacktestConfig(
-        symbols=["sh600000"],  # 浦发银行
+        symbols=["sh600000", "sz000001", "sh600519"],  # 浦发银行, 平安银行, 贵州茅台
         start_date="2023-01-01",
         end_date="2024-12-31",
         initial_cash=1_000_000,
     )
 
     runner = BacktestRunner(config)
-    results = runner.run(SmaCross)
+    results = runner.run(FiveDayReversal)
     print_results(results, config.initial_cash)