feat: add price movement context to flip-flop detection

Improved flip-flop penalty logic to distinguish between:
- Chop (bad): <2% price move from opposite signal → -25 penalty
- Reversal (good): ≥2% price move from opposite signal → allowed

Changes:
- lib/database/trades.ts: getRecentSignals() now returns oppositeDirectionPrice
- lib/trading/signal-quality.ts: Added currentPrice parameter, price movement check
- app/api/trading/check-risk/route.ts: Added currentPrice to RiskCheckRequest interface
- app/api/trading/execute/route.ts: Pass openResult.fillPrice as currentPrice
- app/api/analytics/reentry-check/route.ts: Pass currentPrice from metrics

Example scenarios:
- ETH $170 SHORT → $153 LONG (10% move) = reversal allowed ✅
- ETH $154.50 SHORT → $154.30 LONG (0.13% move) = chop blocked ⚠️

Deployed: 09:18 CET Nov 14, 2025
Container: trading-bot-v4

app/api/trading/execute/route.ts

@@ -365,6 +365,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
           pricePosition: body.pricePosition || 0,
           direction: body.direction,
           symbol: driftSymbol,
+          currentPrice: openResult.fillPrice,
           timeframe: body.timeframe,
         })
         
@@ -596,6 +597,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
         pricePosition: body.pricePosition || 0,
         direction: body.direction,
         symbol: driftSymbol,
+        currentPrice: openResult.fillPrice,
         timeframe: body.timeframe,
       })