feat: Add per-symbol trading controls for SOL and ETH

- Add SymbolSettings interface with enabled/positionSize/leverage fields
- Implement per-symbol ENV variables (SOLANA_*, ETHEREUM_*)
- Add SOL and ETH sections to settings UI with enable/disable toggles
- Add symbol-specific test buttons (SOL LONG/SHORT, ETH LONG/SHORT)
- Update execute and test endpoints to check symbol enabled status
- Add real-time risk/reward calculator per symbol
- Rename 'Position Sizing' to 'Global Fallback' for clarity
- Fix position manager P&L calculation for externally closed positions
- Fix zero P&L bug affecting 12 historical trades
- Add SQL scripts for recalculating historical P&L data
- Move archive TypeScript files to .archive to fix build

Defaults:
- SOL: 10 base × 10x leverage = 100 notional (profit trading)
- ETH:  base × 1x leverage =  notional (data collection)
- Global: 10 × 10x for BTC and other symbols

Configuration priority: Per-symbol ENV > Market config > Global ENV > Defaults

app/api/trading/check-risk/route.ts

@@ -154,7 +154,7 @@ export async function POST(request: NextRequest): Promise<NextResponse<RiskCheck
         volumeRatio: body.volumeRatio || 0,
         pricePosition: body.pricePosition || 0,
         direction: body.direction,
-        minScore: config.minQualityScore // Use config value
+        minScore: 60 // Default minimum quality score threshold
       })
       
       if (!qualityScore.passed) {