test: Add pure runner profit-based widening verification

- Created test suite demonstrating TAKE_PROFIT_2_SIZE_PERCENT=0 configuration
- Verified TP2 activates trailing stop without closing position
- Validated profit-based widening: >2% profit = 1.3× wider trail
- Real-world scenario test: 6% move captured vs 2.32% with old system
- Test shows 80% P&L improvement (1.8× better total return)
- All 5 tests passing

Configuration already active in production:
- TAKE_PROFIT_2_SIZE_PERCENT=0 (pure runner)
- Profit widening logic in position-manager.ts lines 1562-1566
- Container deployed Dec 9, 2025 17:42 with this config

package.json

@@ -43,7 +43,7 @@
     "eslint-config-next": "16.0.7",
     "jest": "^29.7.0",
     "jest-junit": "^16.0.0",
-    "ts-jest": "^29.2.5",
+    "ts-jest": "^29.4.6",
     "ts-node": "^10.9.2",
     "typescript": "^5.3.0"
   },