Add timeframe-aware signal quality scoring for 5min charts

- Lower ADX/ATR thresholds for 5min timeframe (ADX 12-22, ATR 0.2-0.7%)
- Add anti-chop filter: -20 points for extreme sideways (ADX<10, ATR<0.25, Vol<0.9)
- Pass timeframe parameter through check-risk and execute endpoints
- Fixes flip-flop losses from overly strict 5min filters
- Higher timeframes unchanged (still use ADX 18+, ATR 0.4+)

5min scoring now:
- ADX 12-15: moderate trend (+5)
- ADX 22+: strong trend (+15)
- ATR 0.2-0.35: acceptable (+5)
- ATR 0.35+: healthy (+10)
- Extreme chop penalty prevents whipsaw trades

app/api/trading/execute/route.ts

@@ -322,6 +322,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
           volumeRatio: body.volumeRatio || 0,
           pricePosition: body.pricePosition || 0,
           direction: body.direction,
+          timeframe: body.timeframe,
         })
         
         await createTrade({
@@ -550,6 +551,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
         volumeRatio: body.volumeRatio || 0,
         pricePosition: body.pricePosition || 0,
         direction: body.direction,
+        timeframe: body.timeframe,
       })
       
       await createTrade({