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

lib/database/trades.ts

@@ -42,6 +42,7 @@ export interface CreateTradeParams {
   signalSource?: string
   signalStrength?: string
   timeframe?: string
+  isTestTrade?: boolean
 }
 
 export interface UpdateTradeExitParams {
@@ -90,6 +91,7 @@ export async function createTrade(params: CreateTradeParams) {
         signalStrength: params.signalStrength,
         timeframe: params.timeframe,
         status: 'open',
+        isTestTrade: params.isTestTrade || false,
       },
     })
     
@@ -204,6 +206,7 @@ export async function getTradeStats(days: number = 30) {
     where: {
       createdAt: { gte: since },
       status: 'closed',
+      isTestTrade: false, // Exclude test trades from stats
     },
   })