feat: Add P&L Tracking with automatic MT5 history import (V1.9)

Added comprehensive P&L tracking system with automatic MT5 history import:

New Features:
- Automatic MT5 history sync (hourly)
- Entry+Exit deal matching for complete positions
- Real P&L calculation (profit + commission + swap)
- Real Win Rate from closed MT5 trades
- Multi-period analysis (Today, Week, Month, All-Time)
- Live performance dashboard
- Performance metrics (Profit Factor, Max Drawdown, Win/Loss Ratio)
- Recent trades display

Files Added:
- mt5_pnl_tracker.py: Core P&L tracking module (950 lines)
- integrate_pnl_tracker.py: Notebook integration script
- PNL_TRACKER_GUIDE.md: Complete documentation
- PNL_QUICK_START.md: 3-step quick start guide
- BOT_IMPROVEMENTS_SUMMARY.md: Complete improvements timeline

Notebook Changes:
- Added Cells 85-90 (6 new cells for P&L tracking)
- Cell 85: Section header (Markdown)
- Cell 86: Setup P&L tracker
- Cell 87: Initial MT5 history sync
- Cell 88: Add P&L sync to scheduler
- Cell 89: Usage instructions (Markdown)
- Cell 90: Live dashboard display

Scheduler:
- Added pnl_sync job (every 1 hour)
- Automatically imports last 7 days from MT5
- Matches Entry/Exit deals
- Calculates real P&L

Database:
- mt5_deals table: Raw MT5 deals
- matched_positions table: Complete trades (Entry+Exit)
- pnl_summary table: Aggregated metrics

Benefits:
- Know real Win Rate (not estimates)
- Track actual profit/loss accurately
- Validate strategy performance
- Data-driven threshold optimization
- Performance trend analysis

Total Cells: 85 → 91
Version: V1.6 → V1.9

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

dynamic_thresholds.json

@@ -0,0 +1,15 @@
+{
+  "timestamp": "2026-01-21T00:00:02.545761",
+  "session_thresholds": {
+    "asian": 60,
+    "ny": 60,
+    "london": 95,
+    "overlap": 70
+  },
+  "settings": {
+    "lookback_trades": 20,
+    "target_win_rate": 0.6,
+    "min_threshold": 60,
+    "max_threshold": 95
+  }
+}