fix: initialize peak_equity from actual portfolio value on startup

Fixes false 50% drawdown circuit breaker that was blocking all trades.
SafetyManager was initialized with peak_equity=initial_capital (200K)
but OANDA account starts at ~100K, triggering immediate halt.

Now syncs peak_equity to actual portfolio value on startup.

src/main_auto.py

@@ -153,6 +153,15 @@ class BiggFishAuto:
 
         self.krystie.log_startup()
 
+        # 1.5. Initialize peak equity from current portfolio value
+        try:
+            portfolio = self.broker.get_portfolio()
+            current_equity = portfolio.get('portfolio_value', self.config['safety']['initial_capital'])
+            self.safety.peak_equity = max(current_equity, self.safety.peak_equity)
+            logger.info(f"Initialized peak equity: ${self.safety.peak_equity:,.2f}")
+        except Exception as e:
+            logger.warning(f"Could not initialize peak equity: {e}")
+
         # 2. Warm candle cache
         self._warm_cache()