feat: update analytics version descriptions

- Added v4 description: 'Frequency penalties + blocked signals tracking (Nov 11-14)'
- Added v5 description: 'Buy/Sell Signal strategy (pre-Nov 12)'
- Added v6 description: 'HalfTrend + BarColor strategy (Nov 12+)'

Context:
- v1-v4 = signalQualityVersion (scoring logic evolution)
- v5-v6 = indicatorVersion (TradingView strategy versions)
- Dashboard will now correctly label both types of versions

app/api/analytics/version-comparison/route.ts

@@ -120,7 +120,10 @@ export async function GET() {
     const versionDescriptions: Record<string, string> = {
       'v1': 'Original logic (price < 5% threshold)',
       'v2': 'Added volume compensation for low ADX',
-      'v3': 'Stricter: ADX > 18 required for positions < 15%'
+      'v3': 'Stricter: ADX > 18 required for positions < 15%',
+      'v4': 'Frequency penalties + blocked signals tracking (Nov 11-14)',
+      'v5': 'Buy/Sell Signal strategy (pre-Nov 12)',
+      'v6': 'HalfTrend + BarColor strategy (Nov 12+)',
     }
 
     return NextResponse.json({