feat: add quality score display and timezone fixes

- Add qualityScore to ExecuteTradeResponse interface and response object
- Update analytics page to always show Signal Quality card (N/A if unavailable)
- Fix n8n workflow to pass context metrics and qualityScore to execute endpoint
- Fix timezone in Telegram notifications (Europe/Berlin)
- Fix symbol normalization in /api/trading/close endpoint
- Update Drift ETH-PERP minimum order size (0.002 ETH not 0.01)
- Add transaction confirmation to closePosition() to prevent phantom closes
- Add 30-second grace period for new trades in Position Manager
- Fix execution order: database save before Position Manager.addTrade()
- Update copilot instructions with transaction confirmation pattern

lib/drift/orders.ts

@@ -522,9 +522,17 @@ export async function closePosition(
     
     console.log(`✅ Close order placed! Transaction: ${txSig}`)
     
-    // Wait for confirmation (transaction is likely already confirmed by placeAndTakePerpOrder)
-    console.log('⏳ Waiting for transaction confirmation...')
-    console.log('✅ Transaction confirmed')
+    // CRITICAL: Confirm transaction on-chain to prevent phantom closes
+    console.log('⏳ Confirming transaction on-chain...')
+    const connection = driftService.getConnection()
+    const confirmation = await connection.confirmTransaction(txSig, 'confirmed')
+    
+    if (confirmation.value.err) {
+      console.error('❌ Transaction failed on-chain:', confirmation.value.err)
+      throw new Error(`Transaction failed: ${JSON.stringify(confirmation.value.err)}`)
+    }
+    
+    console.log('✅ Transaction confirmed on-chain')
     
     // Calculate realized P&L
     const pnlPerUnit = oraclePrice - position.entryPrice