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

Dockerfile

@@ -27,10 +27,19 @@ RUN npm install --production && \
 # ================================
 FROM node:20-alpine AS builder
 
+# Install system dependencies for Prisma
+RUN apk add --no-cache \
+    python3 \
+    make \
+    g++ \
+    libc6-compat \
+    openssl
+
 WORKDIR /app
 
-# Copy dependencies from deps stage
-COPY --from=deps /app/node_modules ./node_modules
+# Copy package files and install ALL dependencies (including dev)
+COPY package*.json ./
+RUN npm install
 
 # Copy source code
 COPY . .
@@ -67,8 +76,11 @@ COPY --from=builder /app/package*.json ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
-# Copy node_modules
-COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules
+# Copy Prisma schema and generated client from builder
+COPY --from=builder /app/prisma ./prisma
+
+# Copy node_modules from builder (includes Prisma client)
+COPY --from=builder --chown=nextjs:nodejs /app/node_modules ./node_modules
 
 # Set environment variables
 ENV NODE_ENV production