Fix database persistence and add analytics

- Fixed Prisma client not being available in Docker container
- Added isTestTrade flag to exclude test trades from analytics
- Created analytics views for net positions (matches Drift UI netting)
- Added API endpoints: /api/analytics/positions and /api/analytics/stats
- Added test trade endpoint: /api/trading/test-db
- Updated Dockerfile to properly copy Prisma client from builder stage
- Database now successfully stores all trades with full details
- Supports position netting calculations to match Drift perpetuals behavior

app/api/analytics/stats/route.ts

@@ -0,0 +1,32 @@
+/**
+ * Trading Statistics API
+ * 
+ * Performance analytics excluding test trades
+ * GET /api/analytics/stats?days=30
+ */
+
+import { NextRequest, NextResponse } from 'next/server'
+import { getTradingStats } from '@/lib/database/views'
+
+export async function GET(request: NextRequest) {
+  try {
+    const searchParams = request.nextUrl.searchParams
+    const days = parseInt(searchParams.get('days') || '30')
+    
+    const stats = await getTradingStats(days)
+    
+    return NextResponse.json({
+      success: true,
+      stats,
+    })
+  } catch (error) {
+    console.error('❌ Error getting trading stats:', error)
+    return NextResponse.json(
+      {
+        success: false,
+        error: error instanceof Error ? error.message : 'Unknown error',
+      },
+      { status: 500 }
+    )
+  }
+}